Iwatsuki, Zennoske. "Correlations Between the Moss Floras of Japan and of the Southern Appalachians." THe Journal of the Hattori Botanical Laboratory 20 (1958): 304-352.

Iwatsuki, Zennoske, and Aaron J. Sharp. "Molendoa Sendtneriana in the United States." The Bryologist 61, no. 4 (1958): 365-259.