Patrick M. Hanrahan (July 26, 1982). "Creating volume models from edge-vertex graphs". Proceedings of the 9th annual conference on Computer graphics and interactive techniques - SIGGRAPH '82. ACM. pp. 77–84. doi:10.1145/800064.801265. ISBN978-0-89791-076-7. S2CID7054703.
Pat Hanrahan; Jim Lawson (August 4, 1990). "A language for shading and lighting calculations". ACM SIGGRAPH Computer Graphics. 24 (4): 289–298. CiteSeerX10.1.1.210.5592. doi:10.1145/97880.97911.
Pat Hanrahan; Jim Lawson (August 4, 1990). "A language for shading and lighting calculations". ACM SIGGRAPH Computer Graphics. 24 (4): 289–298. CiteSeerX10.1.1.210.5592. doi:10.1145/97880.97911.
Patrick M. Hanrahan (July 26, 1982). "Creating volume models from edge-vertex graphs". Proceedings of the 9th annual conference on Computer graphics and interactive techniques - SIGGRAPH '82. ACM. pp. 77–84. doi:10.1145/800064.801265. ISBN978-0-89791-076-7. S2CID7054703.