| Issue Date | Title | Author(s) | Publisher |
| 2002 | Approximation Classes for Adaptive Methods | Binev, Peter; Dahmen, Wolfgang; DeVore, Ronald; Petrushev, Pencho | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 1973 | The approximation of a certain class of complex functions with respect to a metric of Hausdorff type | Kasčiev, Mihail | Bulgarian Academy of Sciences |
| 1970 | The approximation of continuous functions by interpolatory polynomials | Saxena, R. B. | Bulgarian Academy of Sciences |
| 1970 | Approximation of convex functions with polygones | Popov, Vasil A. | Bulgarian Academy of Sciences |
| 1970 | Approximation of convex sets | Popov, Vasil A. | Bulgarian Academy of Sciences |
| 2008 | Approximation of Experimental Data by Bezier Curves | Vishnevskey, Vitaliy; Kalmykov, Vladimir; Romanenko, Tatyana | Institute of Information Theories and Applications FOI ITHEA |
| 1983 | Approximation of Functions By Means of Linear Summation Baskakov’s Operators in Lp | Djukanova, Teodora A. | Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences |
| 2003 | Approximation of Lipschitz Mappings | Johanis, Michal | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 1977 | Approximation of Plane Compacta by Means of Polynomial Curves | Bojanov, Todor P. | Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences |
| 2007 | Approximation of Univariate Set-Valued Functions - an Overview | Dyn, Nira; Farkhi, Elza; Mokhov, Alona | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2012 | Approximation par des morphismes de chaînes et points fixes des applications multivoques | Cauty, Robert | Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| 2014 | Approximation Properties of Schurer-Stancu Type Polynomials | Sucu, Sezgin; Done, Yesim; Ibikli, Ertan | Bulgarian Academy of Sciences - National Committee for Mathematics |
| 29-Jun-2021 | The Architectural Cultural Values of Veliko Tarnovo - A Window to History | Koleva, Donka | Institute of Mathematics and Informatics – Bulgarian Academy of Sciences |
| 22-Nov-2010 | An Architectural Model of Rights Management Framework for Information Systems | Valchanov, Nikola; Iliev, Anton | University Press "Paisii Hilendarski", Plovdiv |
| 2008 | Architecture and Implementation of Reporting Means in Adaptive Dynamically Extended Information Systems | Lanin, Vyacheslav | Institute of Information Theories and Applications FOI ITHEA |
| 2010 | Architecture of Extensible Computations Driven Systems | Valchanov, Nikola; Terzieva, Todorka; Shkurtov, Vladimir; Iliev, Anton | Union of Bulgarian Mathematicians |
| 31-May-2019 | Architecture with Culture and Social Value in the 150 Years History of Comunity Center Nadezhda "(Hope)", Veliko Tarnovo, Bulgaria | Koleva, Donka | Institute of Mathematics and Informatics – Bulgarian Academy of Sciences |
| 30-Jun-2023 | The Archived Dialect Heritage and Its Modern Existence | Koteva, Margarita | Institute of Mathematics and Informatics – Bulgarian Academy of Sciences |
| 8-Dec-2023 | Archive Study on Digital Collections of Architectural Graphics Representing 19th Century Houses | Popova, Dimitrina | Institute of Mathematics and Informatics – Bulgarian Academy of Sciences |
| 10-Jun-2022 | ARIMA Model for Day-Ahead Electricity Market Price Forecasting | Popovska, Ekaterina; Georgieva-Tsaneva, Galya | Institute of Mathematics and Informatics – Bulgarian Academy of Sciences |
