%0 Journal Article
%A LI, YONGKUN
%A XU, ERLIANG
%T THREE POSITIVE PERIODIC SOLUTIONS FOR DYNAMIC EQUATIONS WITH PIECEWISE CONSTANT ARGUMENT AND IMPULSE ON TIME SCALES*
%J Glasgow mathematical journal
%D 2011
%P 369-377
%V 53
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089510000790/
%R 10.1017/S0017089510000790
%F 10_1017_S0017089510000790