Warren, William H.; Whang, Suzanne (1987). "Visual guidance of walking through apertures: Body-scaled information for affordances". Journal of Experimental Psychology: Human Perception and Performance. 13 (3): 371–383. doi:10.1037/0096-1523.13.3.371. ISSN1939-1277. PMID2958586.
Warren, William H.; Whang, Suzanne (1987). "Visual guidance of walking through apertures: Body-scaled information for affordances". Journal of Experimental Psychology: Human Perception and Performance. 13 (3): 371–383. doi:10.1037/0096-1523.13.3.371. ISSN1939-1277. PMID2958586.
Warren, William H.; Whang, Suzanne (1987). "Visual guidance of walking through apertures: Body-scaled information for affordances". Journal of Experimental Psychology: Human Perception and Performance. 13 (3): 371–383. doi:10.1037/0096-1523.13.3.371. ISSN1939-1277. PMID2958586.