Fractured Fractals and Broken Dreams: Self-Similar Geometry through Metric and Measure (Oxford Lecture Series in Mathematics and Its Applications, 7)
Parabolic and hyperbolic shift geometries in warp-drive metrics: mathematical foundations and causality-regularized models
On conformal geometry of almost contact manifolds with B-metric (Author's Abstract in Bulgarian of Dissertation for Doctor in Mathematics, defended on 27.10.1998, VAK, Sofia, Bulgaria)
On Geometry of Manifolds with Some Tensor Structures and Metrics of Norden Type (Author's Abstract in Bulgarian of Dissertation for Doctor of Sciences in Mathematics, defended on 15.06.2017 in Plovdiv University, Bulgaria)
, 1998 