Geodesic
Minimum principle for quadratic spline collocation discretization of a convection-diffusion problem
Kragujevac Journal of Mathematics, Tome 30 (2007) no. 1.

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In this paper the quadratic spline difference scheme for a convection-diffusion problem is derived. With the suitable choice of collocation points we provide the discrete minimum principle. The numerical results implies the uniform convergence of order ${\cal O} (n^{-2} \ln^2 n).$ 
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     author = {Katarina Surla and Zorica Uzelac and Ljiljana Teofanov},
     title = {Minimum principle for quadratic spline collocation discretization of a convection-diffusion problem},
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Katarina Surla; Zorica Uzelac; Ljiljana Teofanov. Minimum principle for quadratic spline collocation discretization of a convection-diffusion problem. Kragujevac Journal of Mathematics, Tome 30 (2007) no. 1. http://geodesic.mathdoc.fr/item/KJM_2007_30_1_a9/