1. On the number of mutually orthogonal partial Latin squares;Abdel-Ghaffar;Ars Combin.,1996
2. An attempt for construction of a triple of pairwise mutually orthogonal Latin squares on 10 elements;Acketa;Zb. Rad. Prirod.-Mat. Fak. Ser. Mat.,1995
3. Kvázicsoportok - hálózatok - nomogramok;Aczél;Mat. Lapok,1964
4. Quasigroups, nets and nomograms;Aczél;Advances in Math.,1965
5. Conditions for a loop to be a group and for a groupoid to be a semi-group;Aczél;Amer. Math. Monthly,1969