Snoo, C. de, Wezel, W.M.C. van, & Riezebos, J. (2011). An open source encyclopedia and debating instrument for planning terms: The hopsopedia. In Fransoo, J.C. & Wilson, J. Wäfler, T. (Eds.), Behavioral operations in planning and scheduling (pp. 433-442-17). Heidelberg: Springer-Verlag Berlin (ISBN 978-3-642-13381-7).

Snoo, C. de, Wezel, W.M.C. van, & Riezebos, J. (2011). A sample of Hopsopedia term descriptions. In Fransoo, J.C., Wäfler, T & Wilson, J. (Eds.), Behavioral operations in planning and schduling (pp. 443-460-18). Heidelberg: Springer-Verlag Berlin (ISBN 978-3-642-13381-7).

Wezel, W.M.C. van, & Riezebos, J. (2011). Advanced decision support for train shunting scheduling. In Fransoo, J.C., Wäfler, T. & Wilson, J. (Eds.), Behavioral operations in planning and scheduling (pp. 413-430-16). Heidelberg: Springer-Verlag Berlin (ISBN 978-3-642-13381-7).