Makoto Kishine, Yoichi Maeda. Locus of viewpoints from which a conic appears circular. The Electronic Journal of Mathematics and Technology. 2023. 17. 2. 138-146
Yoichi Maeda. Observing a solid angle from various viewpoints. Yokohama Mathematical Journal. 2008. 54. 2. 155-160
Hirokazu Yoshida, Yoichi Maeda. Hyperbolic Geometry as a View Screen in Minkowski Space. Proceedings of the 13th Asian Technology Conference in Mathematics (ATCM2008). 2008. 143-152
Yoichi Maeda. Visual angle on the unit sphere. The Electronic Journal of Mathematics and Technology. 2008. 2. 3. 274-280