| Issue Date | Title | Author(s) | Publisher |
| 16-Jun-2021 | Orbital Stability of Solitary Waves to Double Dispersion Equations with Combined Power-Type Nonlinearity | Kolkovska, Natalia; Dimova, Milena; Kutev, Nikolai | MDPI |
| 2019 | Orbital Stability of Solitary Waves to Fourth Order Dispersive Equations with Quadratic Nonlinearity | Kolkovska, N.; Dimova, M.; Kutev, N. | Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences |
| 1974 | Orders of second kind of cyclic semigroups | Todorov, Kalčo | Bulgarian Academy of Sciences |
| 2010 | Organization and Security of the Audio and Video Archive for Unique Bulgarian Bells | Noev, Nikolay | Bulgarian Academy of Sciences - National Committee for Mathematics |
| 2013 | Orthogonal Resolutions and Latin Squares | Topalova, Svetlana; Zhelezova, Stela | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2004 | Oscillation Criteria for First Order Delay Differential Equations | Elabbasy, E.; Hassan, T. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2008 | Oscillation Criteria for Nonlinear Differential Equations of Second Order with Damping Term | Elabbasy, E. M.; Elhaddad, W. W. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2010 | Oscillation Criteria of Second-Order Quasi-Linear Neutral Delay Difference Equations | Thandapani, E.; Pandian, S.; Revathi, T. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2019 | Oscillation of a Circular Cylinder Subject to Water Jet | Mochimaru, Yoshihiro | Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences |
| 2008 | Oscillation of Nonlinear Neutral Delay Differential Equations | Elabbasy, E. M.; Hassan, T. S. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2012 | Oscillation Properties of Some Functional Fourth Order Ordinary Differential Equations | Petrova, Zornitza | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| Mar-1995 | Oscillations in an Age-Dependent Model with a Dominant Age Class | Kostova, Tanya V. | Institute of Mathematics with Computer Center at the Bulgarian Academy of Sciences |
| 1997 | Oscillation Theorems for Perturbed Second Order Nonlinear Differential Equations with Damping | Elabbasy, E. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 1997 | Oscillation Theorems for Second Order Sublinear Ordinary Differential Equations | Elabbasy, E. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2008 | Ostrowski Type Inequalities over Spherical Shells | Anastassiou, George A. | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2012 | Outer Automorphisms of Lie Algebras related with Generic 2×2 Matrices | Fındık, Şehmus | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2011 | Outer endomorphisms of free metabelian Lie algebras | Findik, Sehmus | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2008 | Outliers Resistant Learning Algorithm for Radial-basis-fuzzy-wavelet-neural Network in Stomach Acute Injury Diagnosis Tasks | Bodyanskiy, Yevgeniy; Pavlov, Oleksandr; Vynokurova, Olena | Institute of Information Theories and Applications FOI ITHEA |
| 29-Dec-2022 | Overcoming of Accessibility Problems of Church Cultural Heritage for Children and Youth with Hearing Disabilities by Specialised Safeguarding, Representation, and Digitalisation | Pavlova, Sylvana | Institute of Mathematics and Informatics – Bulgarian Academy of Sciences |
| 2003 | Overdetermined Strata in General Families of Polynomials | Kostov, Vladimir | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
