@article{oai:ynu.repo.nii.ac.jp:00006943, author = {Oguro, Takashi and Sekigawa, Kouei and Yamada, Akira}, issue = {1}, journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学}, month = {}, note = {application/pdf, Concerning the intergarability of almost Kahler manifolds, it is known the conjecture by S.I. Goldberg that a compact almost Kahler manifold is Kahler. In this paper we give a positive partial answer to the conjecture and further introduce the related example constructed by P. Nurowski and M. Przanowski.}, pages = {75--92}, title = {FOUR-DIMENSIONAL ALMOST KAHLER EINSTEIN AND WEAKLY *-EINSTEIN MANIFOLDS}, volume = {47}, year = {1999} }