Juan Flaquer, G. Gárate, M. Pargada. Envelopes of moving quadric surfaces. Computer Aided Geometric Design, 9(4):299-312, 1992. [doi]
@article{FlaquerGP92,
title = {Envelopes of moving quadric surfaces},
author = {Juan Flaquer and G. Gárate and M. Pargada},
year = {1992},
doi = {10.1016/0167-8396(92)90037-P},
url = {http://dx.doi.org/10.1016/0167-8396(92)90037-P},
researchr = {https://researchr.org/publication/FlaquerGP92},
cites = {0},
citedby = {0},
journal = {Computer Aided Geometric Design},
volume = {9},
number = {4},
pages = {299-312},
}