| Issue Date | Title | Author(s) | Publisher |
| 2001 | On a Class of Generalized Elliptic-type Integrals | Garg, Mridula; Katta, Vimal; Kalla, S. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 1970 | On a class of operators with point spectrum | Denčev, Račo | Bulgarian Academy of Sciences |
| 2010 | On a Class of Univalent Functions with Negative Coefficients | Pashkouleva, Donka | Union of Bulgarian Mathematicians |
| 2002 | On a Class of Vertex Folkman Numbers | Nenov, Nedyalko | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 1999 | On a Conditional Cauchy-type Functional Equation Involving Powers | Martin-Gutierrez, Emma | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2010 | On a Convexity Preserving Integral Operator | Oros, Gheorghe; Irina Oros, Georgia | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 1989 | On a Criterion for λ-Sequences | Kostova, Margarita D.; Kasandrova, Ivanka M. | Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences |
| 2007 | On a Differential Equation with Left and Right Fractional Derivatives | Atanackovic, Teodor; Stankovic, Bogoljub | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2008 | On a Direct Approach to the Solution of Inverse Optical Problems | Sharlandjiev, Peter; Stoilov, Georgi | Institute of Information Theories and Applications FOI ITHEA |
| 2011 | On Affine Connections in a Riemannian Manifold with a Circulant Metric and two Circulant Affinor Structures | Dokuzova, Iva; Razpopov, Dimitar | Union of Bulgarian Mathematicians |
| 1998 | On a Five-Diagonal Jacobi Matrices and Orthogonal Polynomials on Rays in the Complex Plane | Zagorodniuk, S. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2012 | On a Generalization of a Theorem due to Larcombe on the Sum of a 3F2 Series | Rakha, Medhat A. | Bulgarian Academy of Sciences - National Committee for Mathematics |
| 1961 | On a generalization of classes of analytic functions, examined by L. Chakalov | Doundouchenko, L. E. | Bulgarian Academy of Sciences |
| 2010 | On a Hypersingular Equation of a Problem, for a Crack in Elastic Media | Gil, Alexey; Samko, Stefan | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 1973 | On a hypothesis for forms with p-adic coefficients | Dodunekov, Stefan | Bulgarian Academy of Sciences |
| 6-Dec-2022 | On a Hypothetical Model with Second Kind Chebyshev’s Polynomial–Correction: Type of Limit Cycles, Simulations, and Possible Applications | Kyurkchiev, Nikolay; Iliev, Anton | MDPI |
| Aug-1996 | On a Maximal Sequence Associated with Simple Branching Processes | Rahimov, Ibrahim; Yanev, George | Institute of Mathematics with Computer Center at the Bulgarian Academy of Sciences |
| 1966 | On a method of determining "prices"of combinations of letters in the written language. I | Simeonov, Emanouil | Bulgarian Academy of Sciences |
| 2015 | On a Modification of the Model of Phillips for Stabilization Control and Adequate Intervention of the Authorized Body Overseeing the Implementation of the Projects of the Operational Programme | Kyurkchiev, Vesselin | Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences |
| 1973 | On an elimination method | Petkov, Milko | Bulgarian Academy of Sciences |
