1. (1) Data Volley: “https://www.dataproject.com” (confirmed in Mar. 2023)
2. (2) SPLYZA Teams: “https://products.splyza.com/teams” (confirmed in Mar. 2023)
3. (3) M. Naiki, T. Masuda, and H. Sawano: “Proposal for a game analysis support application for handball”, Handball Society of Japan, 2-10, p. 1 (2023)
4. 内木正紘・増田健志・澤野弘明：「ハンドボール競技のゲーム分析支援アプリの提案」，ハンドボール学会，2-10, p. 1 (2023)
5. (4) N. Kusuya, I. Kitahara, Y. Kameda, and Y. Ohta: “Online Trajectory Estimation of Soccer Players for Generating Player's View”, The J. of the Institute of Image Electronics Engineers of Japan, Vol. 38, No. 4, pp. 395-403 (2009) (in Japanese)