The one-period bus touring problem: Solved by an effective heuristic for the orienteering tour problem and improvement algorithm. - Ray Deitch; Shaul P. Ladany (Eur. J. Oper. Res., 2000)

Determination of optimal one-period tourist bus tours with identical starting and terminal points. - Ray Deitch; Shaul P. Ladany (Int. J. Serv. Technol. Manag., 2001)