@article{VMUMM_2008_3_a2,
     author = {V. K. Beloshapka},
     title = {The orbit space of the automorphism group of a model surface of type $(1,2)$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {13--16},
     year = {2008},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2008_3_a2/}
}