%0 Journal Article %J Comm. Algebra %D 2001 %T A division theorem for the pseudovariety generated by semigroups of orientation preserving transformations on a finite chain %A Fernandes, Vitor H. %P 451–456 %R 10.1081/AGB-100000811 %U http://dx.doi.org/10.1081/AGB-100000811 %V 29