Hara, Akira: 1920-nendai no zaisei shishutsu to sekkyoku shōkyoku ryōzaisei rosen (Government expenditures in 1920s and positive and passive fiscal strategies), in: Nakamura, Takafusa (ed.): Senkanki no Nihon keizai bunseki (Economic analysis of Japan during the inter-war period), Tokyo 1981 Yamakawa Press, pp. 78-109.