TY - JOUR AU - Arkady Poliakovsky TI - A method for establishing upper bounds for singular perturbation problems JO - Comptes Rendus. Mathématique PY - 2005 SP - 97 EP - 102 VL - 341 IS - 2 PB - Elsevier DO - 10.1016/j.crma.2005.06.009 LA - en ID - CRMATH_2005__341_2_97_0 ER -