Resource-constrained project scheduling: a heuristic for the multi-mode case. - Roland Heilmann (OR Spectr., 2001)

A branch-and-bound procedure for the multi-mode resource-constrained project scheduling problem with minimum and maximum time lags. - Roland Heilmann (Eur. J. Oper. Res., 2003)

RecMap: Rectangular Map Approximations. - Roland Heilmann; Daniel A. Keim; Christian Panse; Mike Sips (INFOVIS, 2004)

Finding Spatial Patterns in Network Data. - Roland Heilmann; Daniel A. Keim; Christian Panse; Jörn Schneidewind; Mike Sips (PaRMa, 2004)