GRIGORIEV, Oleg and PETRUKHIN, Yaroslav. Modal multilattice logics with Tarski, Kuratowski, and Halmos operators. Logic and Logical Philosophy. Online. 20 February 2021. Vol. 30, no. 3, pp. 385-415. [Accessed 2 July 2025]. DOI 10.12775/LLP.2021.003.