@article{AL_2008_47_4_a5,
     author = {A. A. Stepanova},
     title = {Polygons with primitive normal and additive theories},
     journal = {Algebra i logika},
     pages = {491--508},
     publisher = {mathdoc},
     volume = {47},
     number = {4},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2008_47_4_a5/}
}