Ghiu C, Udrişte C, Tuligă R. MULTITIME ACTION RECURRENCES ON A MONOID. Ann. Sofia Univ. Fac. Math. and Inf. [Internet]. 2016 Dec. 12 [cited 2024 Nov. 21];103:53-60. Available from: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/53