Wang, J. - Q. A Study on Pollen Morphology of Potamogeton, Zannichellia and Triglochin from China. Acta Phytotaxonomica Sinica. Additamentum.  Beijing 28, 372?378 (1990).

Endress, P. K. & Stumpf, S. Non-tetrasporangiate stamens in the angiosperms: structure, systematic distribution and evolutionary aspects. Bot. Jahrb. Syst. 112, 193-240 (1990).

Cook, C. D. K. Aquatic plant book. (SPB Academic Publishing, 1990).

Cooke, D. A. & Davies, R. J. - P. A contribution to the taxonomy of Triglochin (Juncaginaceae). Journal of the Adelaide Botanic Gardens 13, 43-47 (1990).

Davy, A. J., Noble, S. M. & Oliver, R. P. Genetic variation and adaptation to flooding in plants. Aquatic BotanyAquatic Botany 38, 91-108 (1990).