J. Rachůnek, F. Švrček

Interior and closure operators on bounded commutative residuated $\ell$-monoids

K. Ślusarska

Distributive differential modals

V. Cheng, S.L. Wismath

$k$-Normalization and $(k + 1)$-level inflation of varieties

G. Dymek

On fuzzy ideals of pseudo $MV$-algebras

I. Chajda, M. Kolařík, S. Radeleczki

Commutative directoids with sectionally antitone bijections

K. Denecke, J. Koppitz, N. Pabhapote

The greatest regular-solid variety of semigroups

H. Belbachir, F. Bencherif

On some properties of Chebyshev polynomials