The following publications are possibly variants of this publication:
- Aperture-angle optimization problems in 3 dimensionsElsa Omaña-Pulido, Godfried T. Toussaint. cccg 1998: [doi]
- Some Aperture-Angle Optimization ProblemsProsenjit Bose, Ferran Hurtado, Elsa Omaña-Pulido, Jack Snoeyink, Godfried T. Toussaint. algorithmica, 33(4):411-435, 2002. [doi]
- Aperture angle optimization problemsProsenjit Bose, Ferran Hurtado, Elsa Omaña-Pulido, Godfried T. Toussaint. cccg 1995: 73-78 [doi]