TY - GEN AU - Shishkin, Grigory I AU - Shishkina, Lidia,P TI - Difference methods for singular perturbation problems T2 - Chapman & Hall/CRC Monographs and Surveys in pure and Applied Mathematics 140 SN - 9781584884590 U1 - 515.392 PY - 2009/// CY - Boca Raton PB - CRC KW - ABSTRACT KW - ALGEBRA KW - APPLIED MATHEMATICS KW - BOUNDARY VALUES KW - DIFFERENTIAL EQUATION KW - MATHEMATICS KW - PERTURBATION ER -