Ovsyannikov, L. V. Group relations of the equation of nonlinear conductivity. (Russian) Zbl 0092.09903 Dokl. Akad. Nauk SSSR 125, 492-495 (1959). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 75 Documents Keywords:partial differential equations × Cite Format Result Cite Review PDF