] , “Hydroid diversity and species composition along a gradient from shallow waters to deep sea around Bermuda”, Deep-Sea Research. Part I: Oceanographic Research Papers, vol. 45, pp. 1843–1860, 1998.
, “Some hydroids (Cnidaria: Hydrozoa) from the Mid-Atlantic Ridge in the north Atlantic Ocean”, Zoologische Verhandelingen, vol. 319, pp. 1–65, 1998.
, “Synopsis of hydroids from 1000m and deeper in the western North Atlantic”, in Proceedings of the 6th International Conference on Coelenterate Biology: the Leeuwenhorst, Noordwijkerhout, The Netherlands, 16-21 July 1995, Leiden, The Netherlands: Nationaal Naturhistorisch Museum, 1997, pp. 85–90.
, “Hydroids (Cnidaria: Hydrozoa) recorded from depths exceeding 3000 m in the abyssal western North Atlantic”, Canadian Journal of Zoology, vol. 74, pp. 1721–1726, 1996.