@article{DAN_1985_285_6_a0,
     author = {V. V. Vershinin and V. G. Gorbunov},
     title = {N.~Ray's elements as obstructions to orientability of symplectic cobordisms},
     journal = {Doklady Akademii Nauk},
     pages = {1289--1292},
     publisher = {mathdoc},
     volume = {285},
     number = {6},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_285_6_a0/}
}