@article{SJIM_2002_5_2_a10,
     author = {N. P. Lazarev},
     title = {Differentiation of the energy functional for the problem of the equilibrium of a~body containing a~crack, with {Signorini} boundary conditions},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {139--147},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2002_5_2_a10/}
}