TY  - JOUR
AU  - Yu. Pesheva
TI  - Necessary Optimality Conditions for Systems of Neutral Type Obtained by a Special Variation
JO  - Mathematica balkanica
PY  - 1999
SP  - 7
VL  - 13
IS  - 1-2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MABA_1999_13_1-2_a1/
ID  - MABA_1999_13_1-2_a1
ER  -