@article{PIM_2013_N_S_93_107_a2,
     author = {Aleksandar Krape\v{z}},
     title = {Quadratic {Level} {Quasigroup} {Equations} {With} {Four} {Variables} {II:} the {Lattice} of {Varieties}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {29 },
     publisher = {mathdoc},
     volume = {_N_S_93},
     number = {107},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_2013_N_S_93_107_a2/}
}