T. Arunkumar และผู้แต่งคนอื่นๆ. (2012) A comparative experimental testing in enhancement of the efficiency of pyramid solar still and hemispherical solar still. <i>International Journal of Renewable Energy</i>, <i>Vol. 7</i>(No.2), pp 1-7.T. Arunkumar และผู้แต่งคนอื่นๆ. "A comparative experimental testing in enhancement of the efficiency of pyramid solar still and hemispherical solar still". International Journal of Renewable Energy Vol. 7 (2012):pp 1-7.T. Arunkumar และผู้แต่งคนอื่นๆ. A comparative experimental testing in enhancement of the efficiency of pyramid solar still and hemispherical solar still. School of Renewable Energy Technology:ม.ป.ท. 2012.