@article{ZNSL_1977_69_a5,
     author = {V. K. Kalantarov and O. A. Ladyzhenskaya},
     title = {The occurrence of collapse for quasilinear equations of parabolic and hyperbolic types},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {77--102},
     publisher = {mathdoc},
     volume = {69},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_69_a5/}
}