@article{IM2_1992_38_2_a4,
     author = {V. Ya. Pidstrigach},
     title = {Deformations of instanton surfaces},
     journal = {Izvestiya. Mathematics },
     pages = {313--331},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1992_38_2_a4/}
}