References
- [1] K. Ahmadidelir, C.M. Campbell and H. Doostie, Two classes of finite semigroups and monoids involving Lucas numbers, Semigroup Forum 78 (2009), 200-209.
- [2] H. Ayik, C.M. Campbell, J.J. O’Connor and N. Ruškuc, The semigroup efficiency of groups and monoids, Math. Proc. R. Ir. Acad. 100A (2000), 171-176.
- [3] C.M. Campbell, J.D. Mitchell and N. Ruškuc, Comparing semigroup and monoid presentations for finite monoids, Monatsh. Math. 134 (2002), 287-293.
- [4] C.M. Campbell, J.D. Mitchell and N. Ruškuc, On defining groups efficiently without using inverses, Math. Proc. Cambridge Philos. Soc. 133 (2002), 31-36.
- [5] C.M. Campbell, E.F. Robertson, N. Ruškuc and R.M. Thomas, Semigroup and group presentations, Bull. London Math. Soc. 27 (1995), 46-50.
- [6] C.M. Campbell, E.F. Robertson, N. Ruškuc and R.M. Thomas, On semigroups defined by Coxeter-type presentations, Proc. Roy. Soc. Edinburgh Sect. A 125 (1995), 1063-1075.
- [7] C.M. Campbell, E.F. Robertson, N. Ruškuc and R.M. Thomas, Fibonacci semigroups, J. Pure Appl. Algebra 94 (1994), 49-57.
- [8] C.M. Campbell, E.F. Robertson, N. Ruškuc and R.M. Thomas, On subsemigroups of finitely presented semigroups, J. Algebra 180 (1996), 1-21.
- [9] C.M. Campbell, E.F. Robertson and R.M. Thomas, ”Semigroup presentations and number sequnces”, In: Bergum, G.E., et al. (eds.) Applications of Fibonacci Numbers, vol. 5, pp, 77-83. Springer, Berlin, 1993.
- [10] D.L. Johnson, ”Presentations of Groups”, Cambridge University Press, Cambridge, 1997.
- [11] E.F. Robertson and Y. Ünlü, On semigroup presentations, Proc. Edinburgh Math. Soc. 36 (1993), 55-68.
- [12] N. Ruškuc, ”Semigroup presentations”, Ph.D. Thesis, University of St Andrews, 1995.