Ghiu, C., Udrişte, C. and Tuligă, R. (2016) “MULTITIME ACTION RECURRENCES ON A MONOID”, Ann. Sofia Univ. Fac. Math. and Inf, 103, pp. 53–60. Available at: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/53 (Accessed: 21 November 2024).