@article{1103904252, author = {Gibbons, G. W. and Pope, C. N.}, title = {${\bf C}P^{2}$ as a gravitational instanton}, journal = {Comm. Math. Phys.}, volume = {58}, number = {1}, year = {1978}, pages = { 239-248}, language = {en}, url = {http://dml.mathdoc.fr/item/1103904252} }
Gibbons, G. W.; Pope, C. N. ${\bf C}P^{2}$ as a gravitational instanton. Comm. Math. Phys., Tome 58 (1978) no. 1, pp. 239-248. http://gdmltest.u-ga.fr/item/1103904252/