Collocation Methods for Parabolic Partial Differential Equations in One Space Dimension. H. Cerutti, S.V. Parter (1976) Numerische Mathematik
Control of Stefan Problems by Means of Linear-Quadratic Defect Minimization. Peter Knabner (1985) Numerische Mathematik
Convergence of a dual finite element method in R n Jaroslav Haslinger, Ivan Hlaváček (1975) Commentationes Mathematicae Universitatis Carolinae