International Colloquium on Differential Geometry and its Related Fields (3rd : 2012 : Veliko Turnovo, Bulgaria)
New Jersey : World Scientific, [2014]
2014
International Colloquium on Differential Geometry and its Related Fields (2nd : 2010 : Veliko Tarnovo, Bulgaria)
Hackensack, N.J. : World Scientific, 2012.
2012