Tekin DERELI
Department of Physics, Koc University,
Istanbul, TURKEY
E-mail: tdereli@ku.edu.tr
Sahin KOCAK
Department of Mathematics, Anadolu University,
Eskisehir, TURKEY
E.mail: skocak@anadolu.edu.tr
Monopole equations for 8-manifolds with Spin(7) holonomy: the energy integral