%0 Journal Article %T Monotone Iterative Technique for First-Order Nonlinear Periodic Boundary Value Problems on Time Scales %A Ya-Hong Zhao %A Jian-Ping Sun %J Advances in Difference Equations %D 2010 %I Springer %R 10.1155/2010/620459 %X We investigate the following nonlinear first-order periodic boundary value problem on time scales: x¦¤(t)+p(t)x(¦Ò(t))=f(t,x(t)), t¡Ê[0,T]T, x(0)=x(¦Ò(T)). Some new existence criteria of positive solutions are established by using the monotone iterative technique. %U http://dx.doi.org/10.1155/2010/620459