Edelsbrunner, Herbert, et al. “On the Lower Envelope of Bivariate Functions and Its Applications.”10.1109/SFCS.1987.44__28th Annual Symposium on Foundations of Computer Science , IEEE, 1987, pp. 27–37, doi:10.1109/SFCS.1987.44.
LibreCat: https://research-explorer.ista.ac.at/record/3514
DOI: 10.1109/SFCS.1987.44