AMAKAWA, T. Family Jungermanniaceae of Japan. 1. J. Hattori Bot. Lab. 1959, 21, 248-291
ENGEL, J. J. The taxonomic position of Apotomanthus (Hepaticae). Beih. Nova Hedwigia. 1988, 90, 203-221
GROLLE, R. Eine Nardia aus Africa. Bot. Mag. (Tokyo). 1964, 77, 297-299
HATTORI, S. Oil bodies of Japanese Hepaticae (1). J. Hattori Bot. Lab. 1951, 5, 69-97, pls. 7
INOUE, H. Nardia flagelliformis (sp. nov.), with reference to the subgeneric and sectional revision of the genus Nardia Gray. J. Jap. Bot. 1971, 46, 1-32