@article{MT_1987_7_a9,
     author = {Yu. G. Reshetnyak},
     title = {On the theory of surfaces of bounded integral mean curvature},
     journal = {Matemati\v{c}eskie trudy},
     pages = {158--179},
     year = {1987},
     volume = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1987_7_a9/}
}