Molecular divergence between Treubia Goebel and Apotreubia S. Hatt. & Mizut., the two genera of the archaic liverwort class Treubiopsida (Hepaticophytina). Studies in austral temperate rain forest bryophytes 19. - Stech,M..; Konstantinova,N..A..; Frey,W.. (Nova Hedwigia, 2002)