@article{TMF_2003_137_3_a11,
     author = {M. B. Sheftel},
     title = {Method of {Group} {Foliation,} {Hodograph} {Transformation,} and {Noninvariant} {Solutions} of the {Heavenly} {Equation}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {457--468},
     year = {2003},
     volume = {137},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2003_137_3_a11/}
}