International Journal of Mathematics and Scientific Computing. IJMSC (Int. J. Math. Sci. Comput.) (20150101), 5, no.~2, 70-74. ISSN: 2231-5330 (print).
International Journal of Mathematics and Scientific Computing. IJMSC (Int. J. Math. Sci. Comput.) (20150101), 5, no.~1, 39-43. ISSN: 2231-5330 (print).