1. I Lenz H. Raumsinnstorungen bei Hirnverletzungen. Dtsch Z Nervenheilk 1944;157:22-64.
2. Visual-spatial agnosia associated with lesions of the right cerebral hemisphere;McFie, J.; Piercy, M.F.; Zangwill, O.L.;Brain,1950
3. Visual constructive disabilities associated with lesions of the left cerebral hemisphere;McFie, J.; Zangwill, O.L.;Brain
4. Tactile perception of direction and number in patients with unilateral cerebral disease;Carmon, A.; Benton, A.L.;Neurology (Minneap),1969
5. Spatial orientation in man after cerebral injury. I. Analyses by locus of lesion;Semmes, J.; Weinstein, S.; Ghent, L.; Teuber, H.L.;J Psychol,1955