Rachůnek, J., and F. Švrček. “Interior and Closure Operators on Bounded Commutative Residuated ℓ-Monoids”. Discussiones Mathematicae - General Algebra and Applications, vol. 28, no. 1, 2008, p. 11, https://doi.org/10.7151/dmgaa.1132.
Rachůnek, J., & Švrček, F. (2008). Interior and closure operators on bounded commutative residuated ℓ-monoids. Discussiones Mathematicae - General Algebra and Applications, 28(1), 11. https://doi.org/10.7151/dmgaa.1132
Rachůnek J, Švrček F. Interior and closure operators on bounded commutative residuated ℓ-monoids. Discussiones Mathematicae - General Algebra and Applications. 2008;28(1):11.