Innami, Nobuhiro, Yoe Itokawa, Tetsuya Nagano, and Katsuhiro Shiohama. 2022. “Geodesic Families Characterizing Flat Metrics on a Cylinder and a Plane: Array”. MATHEMATICA SCANDINAVICA 128 (2). https://doi.org/10.7146/math.scand.a-132247.