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