Ahlberg J. H., Nilson E. N., and Walsh J. L., The Theory of Splines and Their Applications, Academic Press, New York (1967).
Stechkin S. B. and Subbotin Yu. N., Splines in Computational Mathematics [Russian], Nauka, Moscow (1976).
Boor C. de, A Practical Guide to Splines, Springer-Verlag, New York (1978).
Zav'yalov Yu. S., Kvasov B. I., and Miroshnichenko V. L., Methods of Spline Functions [Russian], Nauka, Moscow (1980).
Bakhvalov N. S., “The optimization of methods of solving boundary value problems with a boundary layer,” USSR Comput. Math. Math. Phys., vol. 9, no. 4, 139–166 (1969).
Shishkin G. I., Grid Approximation of Singularly Perturbed Elliptic and Parabolic Equations [Russian], UrO RAN, Ekaterinburg (1992).
Zadorin A. I., “The interpolation method for a boundary layer problem,” Sib. Zh. Vychisl. Mat., vol. 10, no. 3, 267–275 (2007).
Zadorin A. I., “Lagrange interpolation and Newton–Cotes formulas for functions with boundary layer components on piecewise-uniform grids,” Numer. Anal. Appl., vol. 8, no. 3, 235–247 (2015).
Zadorin A. I., “Spline interpolation of functions with a boundary layer component,” Intern. J. Numer. Anal. Model. Ser. B, vol. 2, no. 2–3, 262–279 (2011).
Volkov Yu. S., “Interpolation by splines of even degree according to Subbotin and Marsden,” Ukrainian Math. J., vol. 66, no. 7, 994–1012 (2014).
Zmatrakov N. L., “Convergence of an interpolation process for parabolic and cubic splines,” Proc. Steklov Inst. Math., vol. 138, 75–99 (1977).
Zmatrakov N. L., “A necessary condition for convergence of interpolating parabolic and cubic splines,” Math. Notes, vol. 19, no. 2, 100–107 (1976).
Linss T., “The necessity of Shishkin decompositions,” Appl. Math. Let., vol. 14, no. 7, 891–896 (2001).
Miller J. J. H., O’Riordan E., and Shishkin G. I., Fitted Numerical Methods for Singular Perturbation Problems: Error Estimates in the Maximum Norm for Linear Problems in One and Two Dimensions (revised ed.), World Sci., Singapore (2012).
Demko S., “Inverses of band matrices and local convergence of spline projections,” SIAM J. Numer. Anal., vol. 14, no. 4, 616–619 (1977).
Voevodin V. V. and Kuznetsov Yu. A., Matrices and Calculations [Russian], Nauka, Moscow (1984).
Samarskiĭ A. A. and Nikolaev E. S., Methods for Solving Grid Equations [Russian], Nauka, Moscow (1978).
Blatov I. A., “Incomplete factorization methods for systems with sparse matrices,” Comput. Math. Math. Phys., vol. 33, no. 6, 727–741 (1993).