@article{IM2_1972_6_3_a4,
     author = {V. A. Efremovich and \`E. A. Loginov and E. S. Tikhomirova},
     title = {Equimorphisms of {Riemannian} manifolds},
     journal = {Izvestiya. Mathematics },
     pages = {518--528},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1972_6_3_a4/}
}