On a system of functional equations on quasigroups. Z. Stojakovic; J. Usan — 1978 Publications de l'Institut Mathématique [Elektronische Ressource]
On ...-groupoids. Z. Stojakovic; J. Usan — 1979 Publications de l'Institut Mathématique [Elektronische Ressource]
Generalized entropy on GD-groupoids with applications to quasigroups of various arities Z. Stojaković — 1972 Matematički Vesnik
On permutable N-groups W. A. Dudek; Z. Stojakovic — 1988 Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry