1. Cleve, P. T., 1894. Synopsis of the naviculoid diatoms. Part I. — K.svenska Vetensk-Akad. Handl.26, 1–194.
2. Cox, E. J., 1981. The use of chloroplasts and other features of the living cell in the taxonomy of naviculoid diatoms. In: Proceedings of the sixth international diatom symposium. (In press.)
3. Geitler, L., 1937. Der Chromatophorenbau der DiatomeenGyrosigma undNitzschia sigmoidea. — Bot. Zbl. (Beih.)57, 425–431.
4. Geitler, L., 1977. Zur Morphologie und Entwicklungsgeschichte vonEunotia-Arten (Bacillariophyceae). — Plant Syst. Evol.127, 39–43.
5. Geitler, L., 1979. On some peculiarities in the life history of pennate diatoms hitherto overlooked. — Am. J. Bot.66, 91–97.