Sugasawa, S.. "History of Japanese natural product research" Pure and Applied Chemistry, vol. 9, no. 1, 1964, pp. 1-20. https://doi.org/10.1351/pac196409010001
Sugasawa, S. (1964) History of Japanese natural product research. Pure and Applied Chemistry, Vol. 9 (Issue 1), pp. 1-20. https://doi.org/10.1351/pac196409010001