Ashikhmin, D.N.; Volkov, M.V.; Zhang, Wen Ting. The finite basis problem for Kiselman monoids. Demonstr. Math. 48, No. 4, 475-492 (2015) : [review] [Online resource]
Henno, Jaak
Zentralblatt MATH
2016
https://zbmath.org/?t=&s=0&q=06516648