1. Perception in hemiplegia: judgement of vertical and horizontal by hemiplegic patients;Birch;Arch Phys Med Rehabil,1960
2. Perception of the vertical by hemiplegic patients;Hulicka;Am J Phys Med,1961
3. Personality through perception;Whitkin,1954
4. Effect of neck pain on verticality perception: a cohort study;Grod;Arch Phys Med Rehabil,2002
5. Perceptual correlates of the rod and frame test;Adevai;Percept Mot Skills,1968