Nonaka, G.. "Isolation and structure elucidation of tannins" Pure and Applied Chemistry, vol. 61, no. 3, 1989, pp. 357-360. https://doi.org/10.1351/pac198961030357
Nonaka, G. (1989) Isolation and structure elucidation of tannins. Pure and Applied Chemistry, Vol. 61 (Issue 3), pp. 357-360. https://doi.org/10.1351/pac198961030357