@article{ZNSL_1992_200_a6,
     author = {N. M. Ivochkina},
     title = {Viscosity approach to optimal property of $l$-minimal surfaces},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {71--82},
     publisher = {mathdoc},
     volume = {200},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1992_200_a6/}
}