Amazon.com: Linear and Quasilinear Equations of Parabolic
Amazon.com: Linear and Quasilinear Equations of Parabolic,Linear and Quasilinear Parabolic Problems: Volume II,Geometric Theory of Semilinear Parabolic Equations,Tangents to a parabola and lines parallel to the Y axis,Quasilinear Utility and Elasticity of Demand - YouTube