Leppert, S. (2009). The Horizontal on the Vertical: Carl Alexander Park in Baesweiler near the German city of Aachen will be an engine for urban design development. Topos.

Leppert, Stefan. "The Horizontal on the Vertical: Carl Alexander Park in Baesweiler Near the German City of Aachen Will Be an Engine for Urban Design Development." Topos 2009.

Leppert, Stefan. "The Horizontal on the Vertical: Carl Alexander Park in Baesweiler Near the German City of Aachen Will Be an Engine for Urban Design Development." Topos, 2009.