@article{SM_1975_26_3_a3,
     author = {A. L. Gusarov},
     title = {On~a~sharp {Liouville} theorem for solutions of~a~parabolic equation on~a~characteristic},
     journal = {Sbornik. Mathematics},
     pages = {349--364},
     year = {1975},
     volume = {26},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_26_3_a3/}
}