[1]
SerovN.I. and ChernigaR.M. 2003. Lie Symmetries, <em class="a-plus-plus">Q</em&gt;-Conditional Symmetries, and Exact Solutions of Nonlinear Systems of Diffusion-Convection Equations. Ukrains’kyi Matematychnyi Zhurnal. 55, 10 (Oct. 2003), 1340-1355.