In the research group of Liquid crystals at the Institute of Solid State Physics, BAS (1980 - 2011) he became research ²² rank (1982), ² rank (1985) and Assoc. Prof.
Assoc. Prof. Dr. Marin Mitov was head of the Laboratory of „Liquid crystals” (1998 – 2011).
He was deputy director of the ISSP - BAS (1995 – 1999).
Assoc. Prof. Dr. Marin Mitov was one of the creators of the Bulgarian - French Laboratory „Vesicles and Membranes”.
A. Derzhanski, M. Mitov, Chr. Khinov, Piezoelectric Deformation of Liquid Crystal Layer in a Slightly Non-homogeneous Electric Field, Compt. Rend. Acad. Bulg. Sci., 27, 453 (1974).
A. Derzhanski, M. Mitov, Statistical Characteristics of a Deformed Liquid Crystal Layer in a Slightly Nonhomogeneous D. C. Electric Field, Compt. Rend. Acad. Bulg. Sci., 28, 1331 (1975).
A. Derzhanski, A. G. Petrov, M. Mitov, One Dimensional Dielectric-Flexoelectric Deformations in Nematic Layers, Journal Pysics (Paris), 39, 273 (1978).
A. G. Petrov, M. Mitov, A. Derzhanski, Saddle Splay Instability in Lipid Bilayers, Physics Letters, 65A, 374 (1978).
M. Mitov, Third and Fourth Order Elasticity of Lipid Bilayers, Compt. Rend. Acad. Bulg. Sci., 31, 513 (1978).
A. Derzhanski, A. G. Petrov, M. Mitov, Molecular Asymmetry and Saddle-Splay Elasticity in Lipid Bilayers, Ann. Phys., 3, 297 (1978).
A. Derzhanski, H. Hinov, M. Mitov, A Bulk Flexoelectric Effect in a Wedge like Nematic Liquid Crystal Layer, Acta Phys. Polonica, A55, 567 (1979).