Based on the author's thesis (doctoral)--Tōkyō Daigaku, 2011.
Based on the author's thesis (doctoral)--Tōkyō Daigaku, 2011, entitled: Daikōkyōki Nihon nōson ni okeru keizaiteki tōgō seisaku no igi to genkai : Nagano-ken Shimoina gunka 2-kason o jirei to shite.