TY - JOUR AU - Krastev, Vladimir TI - Mangasarian-type Sufficient Optimality Conditions for Age-Structured Control Problems with State Constraints. An Application to Investment in Vintage Capital JO - Serdica Mathematical Journal PY - 2013 SP - 155 EP - 188 VL - 39 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SMJ2_2013_39_2_a4/ LA - en ID - SMJ2_2013_39_2_a4 ER -