Minimizing the fleet size with dependent time-window and single-track constraints. - Lei Lei; Ronald Armstrong; Shanhong Gu (Oper. Res. Lett., 1993)

An Efficient Algorithm for a Class of Two-Resource Allocation Problems. - Ronald Armstrong; Shanhong Gu; Lei Lei (INFORMS J. Comput., 1998)

A zero-inventory production and distribution problem with a fixed customer sequence. - Ronald Armstrong; Su Gao; Lei Lei (Ann. Oper. Res., 2008)

A mixed integer programming model for multiple stage adaptive testing. - Jennifer Edmonds; Ronald Armstrong (Eur. J. Oper. Res., 2009)