Ramanujan Journal. An International Journal Devoted to the Areas of Mathematics Influenced by Ramanujan (Ramanujan J.) (20190101), 49, no.~1, 105-113. ISSN: 1382-4090 (print).eISSN: 1572-9303.
International Journal of Algebra and Computation (Internat. J. Algebra Comput.) (20120101), 22, no.~8, 1240006, 4~pp. ISSN: 0218-1967 (print).eISSN: 1793-6500.