@article{SJVM_2005_8_4_a4,
     author = {A. A. Kalinkin and Yu. M. Laevsky},
     title = {On extrapolation with respect to a~parameter in the perturbed mixed variational problem},
     journal = {Sibirskij \v{z}urnal vy\v{c}islitelʹnoj matematiki},
     pages = {307--323},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJVM_2005_8_4_a4/}
}