@article{IM2_1996_60_1_a8,
     author = {N. A. Tyurin},
     title = {Necessary and sufficient conditions for a~deformation of {a~B-monopole} into an instanton},
     journal = {Izvestiya. Mathematics},
     pages = {217--231},
     year = {1996},
     volume = {60},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1996_60_1_a8/}
}