Brozos-Vázquez, Miguel; Fiedler, Bernd; García-Río, Eduardo; Gilkey, Peter; Nikčević, Stana; Stanilov, Grozio; Tsankov, Yulian; Vázquez-Lorenzo, Ramón; Videv, Veselin
SIGMA, Symmetry Integrability Geom. Methods Appl. 3, Paper 095, 13 p., electronic only (2007)