@article{ZNSL_1987_159_a16,
     author = {M. N. Yakovlev},
     title = {Nonlinear boundary value problems for second order systems with one-sided growth constraints of the right side with respect to the first derivatives},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {156--175},
     publisher = {mathdoc},
     volume = {159},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_159_a16/}
}