Rajendiran, R. , devi, S. , SureshKumar, B. , Priya, V.. "Screening of Process Variables for the Production of Extracellular Lipase from Palm Oil by Trichoderma Viride using Plackett-Burman Design". World Academy of Science, Engineering and Technology, Open Science Index 51, International Journal of Agricultural and Biosystems Engineering, (2011), 5(3), 112 - 115.