Veluppillai, M., 1981. A theorem on the congruences [1/2 (p-1)]! = ± 1 (mod p).. Journal of the National Science Foundation of Sri Lanka, 9(1), p.77.

Veluppillai M. A theorem on the congruences [1/2 (p-1)]! = ± 1 (mod p).. Journal of the National Science Foundation of Sri Lanka. 1981;9(1):77.

Veluppillai, M. (1981). A theorem on the congruences [1/2 (p-1)]! = ± 1 (mod p).. Journal of the National Science Foundation of Sri Lanka, 9(1), 77.

1. Veluppillai M. A theorem on the congruences [1/2 (p-1)]! = ± 1 (mod p).. Journal of the National Science Foundation of Sri Lanka. 1981;9(1):77.

Veluppillai M, ‘A Theorem on the Congruences [1/2 (p-1)]! = ± 1 (mod P).’ (1981) 9 Journal of the National Science Foundation of Sri Lanka 77

Veluppillai, M.. 1981. “A Theorem on the Congruences [1/2 (p-1)]! = ± 1 (mod P).”. Journal of the National Science Foundation of Sri Lanka 9 (1): 77.

Veluppillai, M.. “A Theorem on the Congruences [1/2 (p-1)]! = ± 1 (mod P).”. Journal of the National Science Foundation of Sri Lanka 9, no. 1 (1981): 77.

Veluppillai, M. “A theorem on the congruences [1/2 (p-1)]! = ± 1 (mod p).”. Journal of the National Science Foundation of Sri Lanka, vol. 9, no. 1, 1981, p. 77.