Pitawala, Amarasooriya H. M. T. G. Biogeochemistry, Max Planck Institute for Chemistry, Max Planck Society;
Pitawala, A. H. M. T. G. (1999). The apatite-bearing marbles of Eppawala, Sri Lanka: Petrographic and geochemical evidence for a carbonatitic origin. PhD Thesis, Johannes Gutenberg-Universität, Mainz.