Centrally isotopic quasigroups, pp. 1-12

Some results on the up to fourth lenght balanced identities, pp. 13-34

Incidence systems over groups that can be supplemented

up to projective planes, pp. 35-52

Invertible elements in associates and semigroups 1, pp. 53-68

Symmetric n-loops with the inverse property, pp. 69-80

Fuzzy subquasigroups, pp. 81-98

On automorphisms of the cartesian squares of a groupoid, pp. 99-106