@article{ND_2009_5_4_a1,
     author = {Yu. A. Grigor'ev and A. V. Tsiganov},
     title = {On the {Abel} equations and the {Richelot} integrals},
     journal = {Russian journal of nonlinear dynamics},
     pages = {463--478},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2009_5_4_a1/}
}