@article{ZNSL_1983_124_a3,
     author = {T. A. Tushkina},
     title = {Finding of ``wasp waist'' in partial ordering graph},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {41--43},
     publisher = {mathdoc},
     volume = {124},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_124_a3/}
}