- Asano, S., S. Nagasawa, and S. Fushimi. 1968. Studies on the control of forest pests: II, Spatial distribution of adults of Cryphalus fulvus Niisima emerged from dead pine branches (In Japanese, English summary) . Botyu Kagaku 33:54-61.
- Nagasawa, S., S. Asano, and S. Fushimi. 1968a. Studies on control of forest insects, III. Effectiveness of BHC emulsifiable concentrate on adults of Cryphalus fulvus Niisima living beneath the bark of pine tree [In Japanese, English summary]. Botyu-Kagaku 33(3):80-85.
- Nagasawa, S., S. Asano, and S. Fushimi. 1968b. Studies on the control of forests pests, V. The toxic action of a mixture of Gamma-BHC and EDB to Cryphalus fulvus Niisima [In Japanese, English summary]. Botyu-Kagaku 33(4):153-158.
- Nagasawa, S., S. Asano, M. Shiba, and S. Fushimi. 1968. Studies on the control of forest pests, I. Spatial distribution of egg galleries of Cryphalus fulvus Niisima and Ips tosaensis Murayama on dead pine braches [In Japanese, English summary]. Botyu-Kagaku 33(2):46-54.