TY  - JOUR
AU  - LI, YONGKUN
AU  - XU, ERLIANG
TI  - THREE POSITIVE PERIODIC SOLUTIONS FOR DYNAMIC EQUATIONS WITH PIECEWISE CONSTANT ARGUMENT AND IMPULSE ON TIME SCALES*
JO  - Glasgow mathematical journal
PY  - 2011
SP  - 369
EP  - 377
VL  - 53
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089510000790/
DO  - 10.1017/S0017089510000790
ID  - 10_1017_S0017089510000790
ER  -