Akio Matsumoto, Keiko Nakayama and Ferenc Szidarovszky. Study on Environmental Policy for Non-Point Source Pollutions in a Bertrand Duopoly. IEAM-V6 [Internet]. 2021 Feb. 20 [cited 2026 Jun. 4];:1-14. Available from: https://stm.bookpi.org/IEAM-V6/article/view/338