Geodesic
On a complement to Hadamard’s theorem
Doklady Akademii Nauk, Tome 206 (1972) no. 5, pp. 1049-1051 
A. F. Leont'ev. On a complement to Hadamard’s theorem. Doklady Akademii Nauk, Tome 206 (1972) no. 5, pp. 1049-1051. http://geodesic.mathdoc.fr/item/DAN_1972_206_5_a5/
@article{DAN_1972_206_5_a5,
     author = {A. F. Leont'ev},
     title = {On a complement to {Hadamard{\textquoteright}s} theorem},
     journal = {Doklady Akademii Nauk},
     pages = {1049--1051},
     year = {1972},
     volume = {206},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_206_5_a5/}
}
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