Existence of multiple positive solutions for the system of higher order boundary value problems on time scales. - Erbil Çetin; Serap Gulsan Topal (Math. Comput. Model., 2010)

Symmetric positive solutions of fourth order boundary value problems for an increasing homeomorphism and homomorphism on time-scales. - Erbil Çetin; F. Serap Topal (Comput. Math. Appl., 2012)