TY - JOUR AU - A. B. Vasil'eva TI - Andrey Nikolaevich Tikhonov and his school for singular perturbation problem JO - Matematičeskoe modelirovanie PY - 2001 SP - 6 EP - 9 VL - 13 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MM_2001_13_12_a1/ LA - ru ID - MM_2001_13_12_a1 ER -