@article{ZNSL_1986_154_a9,
     author = {G. V. Kuz'mina},
     title = {On the extremal properties of quadratic differentials with strip domains in the structure of trajectories},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {110--129},
     publisher = {mathdoc},
     volume = {154},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1986_154_a9/}
}