Optimum Arrangement of Photovoltaic Systems in Housing at Khartoum: Application of Renewable Energy in Urban Design.Published in:Urban Studies Research, 2011, v. 2011, p. 1, doi. 10.1155/2011/983742By:Elhassan, Zeinab Abdallah M.;Zain, Muhammad Fauzi Mohd;Sopian, Kamaruzzaman;Abass, A. A.Publication type:Article