References
Nielsen, K.S., Nielsen, J.K. & Bromley, R.G. 2003.
Palaeoecological and ichnological significance of microborings in Quaternary foraminifera.
Palaeontologia Electronica, 6 (2): 13 pp.
http:/palaeoelectronica.org/paleo/2003_1/issue1_03.htm. [Active June 2006.]