@article{ZNSL_2009_371_a5,
     author = {E. G. Emel'yanov},
     title = {A sewing theorem for quadratic differentials},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {69--77},
     publisher = {mathdoc},
     volume = {371},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2009_371_a5/}
}