1. Bungartz, H.-J., Griebel, M.: Sparse grids. Acta numerica 13, 147–269 (2004)
2. Dirnstorfer, S.: An Introduction to Theta-Calculus. SSRN eLibrary (2005)
3. Forsyth, P. A., Vetzal, K. R.: Quadratic convergence of a penalty method for valuing American options. SIAM J. Sci. Comp. 23, 2095–2122 (2002)
4. Griebel, M., Schneider, M., Zenger, C.: A combination technique for the solution of sparse grid problems. In: de Groen, P., Beauwens, R. (eds) Iterative Methods in Linear Algebra, pp. 263–281. IMACS (1992)
5. Mertens, T.: Option pricing with sparse grids. Computing in Economics and Finance, 449 (2005)