Greene, N (1986). "Environment mapping and other applications of world projections". IEEE Comput. Graph. Appl. 6 (11): 21–29. doi:10.1109/MCG.1986.276658. S2CID11301955.
Greene, N (1986). "Environment mapping and other applications of world projections". IEEE Comput. Graph. Appl. 6 (11): 21–29. doi:10.1109/MCG.1986.276658. S2CID11301955.