%0 Journal Article %A Su, Hua %A Wang, Baohe %A Wei, Zhongli %T Positive solutions of four-point boundary-value problems for four-order $p$-Laplacian dynamic equations on time scales %J Electronic Journal of Differential Equations %D 2006 %V 2006 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a10/ %G en %F EJDE_2006__2006__a10