Williams, D. M. (1996). Fossil species of the diatom genus Tetracyclus (Bacillariophyta, 'ellipticus' species group): morphology, interrelationships and the relevance of ontogeny. Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences. 351(1348): 1759-1782.
Fossil species of the diatom genus Tetracyclus (Bacillariophyta, 'ellipticus' species group): morphology, interrelationships and the relevance of ontogeny
Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences