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Campbell, C. M., Havas, G., Ramsay, C. and Robertson, E. F. (2014) All simple groups with order from 1 million to 5 million are efficient. International Journal of Group Theory, 3 1: 17-30. 70 12 Cited 0 times in Scopus0
Havas, G. and Ramsay, C. (2003). Andrews-Curtis and Todd-Coxeter proof words. In: C. Campbell, E. Robertson and G. Smith, Groups St Andrews 2001 in Oxford. Groups St Andrews 2001 in Oxford, Oxford, (232-237). 5-18 August, 2001. 57  
Havas, G. and Ramsay, C. (2003) Breadth-first search and the Andrews-Curtis conjecture. International Journal of Algebra And Computation, 13 1: 61-68. doi:10.1142/S0218196703001365 67 6 5 Cited 7 times in Scopus7 0
Donovan, D. M., Mahmoodian, E., Ramsay, C. and Street, A. P. (2003). Defining sets in combinatorics: a survey. In C.D. Wensley (Ed.), Surveys in Combinatorics 2003 (pp. 115-174) UK: Cambridge University Press. 183  
Havas, George, Lawrence, Julie L., Ramsay, Colin, Street, Anne Penfold and Yazici, Emine Sule (2008) Defining Set Spectra for Designs can have Arbitrarily Large Gaps. Utilitas Mathematica, 75 67-81. 67 1 6 Cited 6 times in Scopus6
Conder, Marston, Havas, George and Ramsay, Colin (2006). Efficient presentations for the Mathieu simple group M22 and its cover. In: A. Hulpke, R. Liebler, T. Penttila and A. Seress, Finite Geometries, Groups, and Compuation, Proceedings of the Conference Finite Geometries, Groups, and Computation. Finite Geometries, Groups, and Computation, Pingree Park, CO, United States, (33-41). 4-9 September 2004. 61 1
Gray, Ken, Street, Anne Penfold, Harris, Karen and Ramsay, Colin (2005) Existence of complementary pairs of proportionally balanced designs. Utilitas Mathematica, 67 43-64. 75   0 Cited 0 times in Scopus0
Havas, G. and Ramsay, C. (2001). Experiments in coset enumeration. In: W.M. Kantor and A. Seress, Groups and Computation III: Proceedings of the International Conference at the Ohio State University. Groups and Computation, Columbus, Ohio, (183-192). 15-19 June, 1999. 48   3
Campbell, C.M., Havas, G., Ramsay, C. and Robertson, E.F. (2004) Nice efficient presentation for all small simple groups and their covers. LMS Journal of Computation and Mathematics, 7 266-283. 74  
Havas, George and Ramsay, Colin (2007). On proofs in finitely presented groups. In: Campbell, C.M., Quick, M.R., Robertson, E.F. and Smith, G.C., Groups St Andrews 2005. Groups St Andrews 2005, St Andrews, Scotland, (457-474). 30 July - 6 August, 2005. 46  
Campbell, Colin M., Havas, George, Ramsay, Colin and Robertson, Edmund F. (2007) On the efficiency of the simple groups of order less than a million and their covers. Experimental Mathematics, 16 3: 347-358. doi:10.1080/10586458.2007.10129006 63 3 2 Cited 3 times in Scopus3 0
Ramsay, C. (1999) On the index of simple trades. Australasian Journal of Combinatorics, 20 207-221. 30  
Gray, B. and Ramsay, C. (2000) On the spectrum of Steiner (v, k, t) trades (I). Journal of Combinatorial Mathematics and Combinatorial Computing, 34 133-158. 50  
Gray, Brenton D. and Ramsay, Colin (1999) On the spectrum of Steiner (v,k,t) trades (II). Graphs and Combinatorics, 15 4: 405-415. doi:10.1007/s003730050074 27   6 Cited 7 times in Scopus7 0
Havas, G. and Ramsay, C. (2000). Parallel COSET enumeration using threads. In: X-S Gao and D Wang, Proceedings of the Fourth Asian Symposium: ASCM 2000. ASCM 2000, Thailand, (29-38). 17-21 December 2000. 37  
Havas, George and Ramsay, Colin (2000) Proving a group trivial made easy: A case study in COSET enumeration. Bulletin of the Australian Mathematical Society, 62 2000: 105-118. 34   5 Cited 5 times in Scopus5
Lindsay, Peter, Ramsay, Colin, Vilaplana, Miguel, Leones, Javier Lopez, Casado, Enrique and Parks, Paul (2009). Robustness of idle-throttle continuous descent approach trajectories against modified timing requirements. In: 9th AIAA Aviation technology, Integration and Operations Conference (ATIO '09). 9th AIAA Aviation technology, Integration and Operations Conference (ATIO '09), South Carolina, USA, (1-24). 21-23 September 2009. 71   Cited 0 times in Scopus0
Havas, G. and Ramsay, C. (2003). Short balanced presentations of perfect groups. In: C. Campbell, E. Robertson and G. Smith, Groups St Andrews 2001 in Oxford. Groups St Andrews 2001 in Oxford, Oxford, (238-243). 5-18 August, 2001. 32  
Adams, P., Khodkar, A. and Ramsay, C. (2001) Smallest defining sets of some STS. Journal of Combinatorial Mathematics and Combinatorial Computing, 38 225-230. 36  
Gray, Brenton D. and Ramsay, Colin (1999) Some results on defining sets of t-designs. Bulletin of the Australian Mathematical Society, 59 2: 203-215. doi:10.1017/S0004972700032822 18   4 Cited 5 times in Scopus5 0
Ramsay, C. (2003) The IQ-block: An interesting polyomino puzzle. Journal of Recreational Mathematics, 31 4: 261-266. 79  
Ramsay, Colin (1998). Trades and Defining Sets: Theoretical and Computational Results PhD Thesis, Information Technology and Electrical Engineering, University of Queensland. 92