1991
- On Gloeocystis Naegeli from Kerala PDF
2010
- Physico- chemical and biological characterization of effluent from KMML. (Kerala Minerals and Metals Limited) T^1 O^2 industry, Chavara , Kollam distt. Kerala PDF
1990
- Genus Lagynion Pascher form Kerala PDF
2009
- Effect of air pollution on three plant species growing aroung Chavara industrial area , Kollam, Kerala PDF