By Sarma, Arup K., Singh, Vijay P., Kartha, Suresh A., Bhattacharjya, Rajib K.
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By Moreira, Francisco, Arianoutsou, Margarita, Corona, Piermaria, De las Heras, Jorge
By Varentsov, I.M.
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By Parker, Douglas D., Tsur, Yacov
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By El-Sabh, Mohammed I., Venkatesh, Srinivasan, Lomnitz, Cinna, Murty, Tad S.
By Nemec, J.
By Cabrera, Enrique, Vela, Antonio F.
By Conservation Commission of the World Energy Conference
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By Nagy, Professor Gregory
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By Clarke, Robin
By Pearce, Fred
By Welland, Michael
By Kurlansky, Mark