Stringer I. A. N., McLean M. J., Arnold G. C., Bassett S. M. & Montefiore R. (2002). "Growth and development of the rare land snail Paryphanta busbyi watti (Eupulmonata : Rhytididae)". Molluscan Research22(3): 203-220. doi:10.1071/MR02010, PDF.
Stringer I. A. N., McLean M. J., Arnold G. C., Bassett S. M. & Montefiore R. (2002). "Growth and development of the rare land snail Paryphanta busbyi watti (Eupulmonata : Rhytididae)". Molluscan Research22(3): 203-220. doi:10.1071/MR02010, PDF.