TY - JOUR AU - Aleksandar Krapež TI - Quadratic Level Quasigroup Equations With Four Variables I JO - Publications de l'Institut Mathématique PY - 2007 SP - 53 VL - _N_S_81 IS - 95 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2298/PIM0795053K/ DO - 10.2298/PIM0795053K LA - en ID - 10_2298_PIM0795053K ER -