@article{VUU_2010_4_a2,
     author = {P. E. Ryabov},
     title = {Analytic classification of singularities in the integrable {Kowalevski{\textendash}Yehia} case},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {25--30},
     year = {2010},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2010_4_a2/}
}