Doweld, A. B. (2014). (2285–2286) Proposals to conserve the names Umbellina against Umbella and Umbellinaceae against Umbellaceae (fossil Charophyta). Taxon. 63(2): 441-442.
(2285–2286) Proposals to conserve the names <I>Umbellina</I> against <I>Umbella</I> and <I>Umbellinaceae</I> against <I>Umbellaceae</I> (fossil <I>Charophyta</I>)