International Colloquium on Differential Geometry and its Related Fields Veliko Tŭrnovo, Bulgaria, Adachi, T., Hashimoto, H., & Hristov, M. J. (2014). Prospects of differential geometry and its related fields: Proceedings of the 3rd International Colloquium on Differential Geometry and its Related Fields, Veliko Tarnovo, Bulgaria, 3-7 September 2012. World Scientific.

International Colloquium on Differential Geometry and its Related Fields Veliko Tŭrnovo, Bulgaria, Toshiaki Adachi, Hideya Hashimoto, and Milen J. Hristov. Prospects of Differential Geometry and Its Related Fields: Proceedings of the 3rd International Colloquium on Differential Geometry and Its Related Fields, Veliko Tarnovo, Bulgaria, 3-7 September 2012. New Jersey: World Scientific, 2014.

International Colloquium on Differential Geometry and its Related Fields Veliko Tŭrnovo, Bulgaria, et al. Prospects of Differential Geometry and Its Related Fields: Proceedings of the 3rd International Colloquium on Differential Geometry and Its Related Fields, Veliko Tarnovo, Bulgaria, 3-7 September 2012. World Scientific, 2014.