1. M. R. Darafsheh, A. R. Ashrafi, and G. A. Moghani, (p,q,r)-generations of the Conway group Co1 for odd p, Kumamoto J. Math. 14 (2001), 1–20.[MR]
  2. Modjtaba Ghorbani and Ali Reza Ashrafi, Counting the number of hetero fullerenes, Journal of Computational and Theoretical Nanoscience 3 (2006), no. 5, 803–810.[link]