| Issue Date | Title | Author(s) | Publisher |
| 1959 | Bahnen eines symmetrischen Wirbelpaares hinter einem Kreiszylinder und deren Zusammenhang mit dem Zylinderwiderstand | Dolaptschiew, Bl.; Sendow, Bl. | Bulgarian Academy of Sciences |
| 1963 | Berechenbare und μ-rekursive Operatoren | Skordev, D. | Bulgarian Academy of Sciences |
| 1974 | Branching random processes with immigration | Janev, Nikolaj | Bulgarian Academy of Sciences |
| 1972 | Canonical frame of a line complex in three-dimensional space with an absolute of two real planes and two real points on the curve of their intersection | Borissow, Adrian | Bulgarian Academy of Sciences |
| 1966 | Canonical frame of reference of the three-parametric systems of straight lines in four-dimensional projective space | Ivanova-Karatopraklieva, Ivanka | Bulgarian Academy of Sciences |
| 1969 | Certain geometric interpretation of the second order differential invariants of three-parameter families of lines in P4 | Ivanova-Karatopraklieva, Ivanka | Bulgarian Academy of Sciences |
| 1963 | Certain indispensable conditions for amplified stability of a series of random variables | Obretenov, A. | Bulgarian Academy of Sciences |
| 1970 | A certain problem of localization of the zeros of a given polynomial | Karanikolov, Hristo N. | Bulgarian Academy of Sciences |
| 1970 | Certain theorems on the indecomposibility of integer polynomials in the field of rational numbers whose values are powers of a prime | Pirgov, Dimităr; Kantardžieva, Elena | Bulgarian Academy of Sciences |
| 1973 | The characteristics of certain orthogonal nets | Markov, G. | Bulgarian Academy of Sciences |
| 1972 | A check of the logical structure of programmes written for Minsk-2 | Bârnev, Petâr; Ahegukjan, Aleksandâr | Bulgarian Academy of Sciences |
| 1963 | Concentration of stress under a rotary punch | Dimovski, I. | Bulgarian Academy of Sciences |
| 1974 | The concept of accident proneness | Cane, Violet R. | Bulgarian Academy of Sciences |
| 1964 | Conformal mapping between ruled surfaces | Krăstev, R. | Bulgarian Academy of Sciences |
| 1973 | Connection on some surfaces embedded in the projective space with affinor structure | Visnevsky, V. V.; Pavlov, E. V. | Bulgarian Academy of Sciences |
| 1962 | Considérations géometriques sur quelques processus non-stationnaires de la hydrodynamique | Ghéorghiev., Gh | Bulgarian Academy of Sciences |
| 1954 | Construction de la famille de trajectories d'un projectille d'après les données directes obtenues des tirs aux polygones | Popoff, Kiril | Bulgarian Academy of Sciences |
| 1969 | Convergence and summability of series of Bessel's generalized polynomials | Baichev, Ivan | Bulgarian Academy of Sciences |
| 1966 | Convergence of series of Jacobi and Bessel polynomials on the boundaries of their regions of convergence | Russev, Peter | Bulgarian Academy of Sciences |
| 1970 | Convergence of the derivatives of positive linear operators | Sendov, Blagovest; Popov, Vasil A. | Bulgarian Academy of Sciences |
