DUTTA, M., & MANOCHA, K. P. (1983). A CLASS OF ORTHOGONAL POLYNOMIALS OF A NEW TYPE. International Journal of Mathematics and Mathematical Sciences, 1983(), 171-180. https://doi.org/10.1155/S0161171283000150
HO, Y. C. P. (1996). ON COMPLETELY 0-SIMPLE SEMIGROUPS. International Journal of Mathematics and Mathematical Sciences, 1996(), 507-520. https://doi.org/10.1155/S0161171296000713