@article{SM_1975_25_4_a1,
     author = {Yu. B. Rudyak},
     title = {Formal groups and bordisms with singularities},
     journal = {Sbornik. Mathematics},
     pages = {487--505},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_25_4_a1/}
}