Reference Frames for Spatial Inference in Text Understanding. - Berry Claus; Klaus Eyferth; Carsten Gips; Robin Hörnig; Ute Schmid; Sylvia Wiebrock; Fritz Wysotzki (Spatial Cognition, 1998)

Inference and Visualization of Spatial Relations. - Sylvia Wiebrock; Lars Wittenburg; Ute Schmid; Fritz Wysotzki (Spatial Cognition, 2000)