1. H. Abdolzadeh and R. Sabzchi, An infinite family of finite 2-groups with deficiency zero, Int. J. Group Theory, Vol. 6(3) (2017), 45–49.
2. M. J. Beetham and C. M. Campbell, A note on the Todd-Coxeter coset enumeration algorithm, P. Edinburgh Math. Soc. 20 (1976) 73–79.
3. G. Havas, M. F. Newman and E. A. O’Brien, Groups of deficiency zero, DIMACS Ser. Discrete Math. Theoret. Comput. Sci., 25 (1994) 53–67.
4. D. L. Johnson, Topics in the theory of group presentations, London Math. Soc. Lecture Note Ser., 42 Cambridge University Press, Cambridge, 1980.
5. R. Sabzchi and H. Abdolzadeh, An infinite family of finite 3-groups with deficiency zero, J. Algebra Appl., Vol. 18(7) (2019), 1–12.
6. The GAP Group, GAP | Groups, Algorithms and Programming, Version 4.4 (available from www.gap-system.org), 2005.