TY - JOUR AU - M. E. Stepantsov TI - A discrete model for age structure of teachers of secondary school JO - Matematičeskoe modelirovanie PY - 2005 SP - 61 EP - 66 VL - 17 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MM_2005_17_3_a5/ LA - ru ID - MM_2005_17_3_a5 ER -