@article{MZM_1987_42_3_a7,
     author = {E. G. Kirnasov},
     title = {Wahlquist{\textendash}Estabrook type coverings over the heat equation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {422--434},
     year = {1987},
     volume = {42},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1987_42_3_a7/}
}