Calculus for interval functions of a real variable S Markov | 254 | 1979 |

Sigmoid functions: some approximation and modelling aspects N Kyurkchiev, S Markov LAP LAMBERT Academic Publishing, Saarbrucken 4, 2015 | 210 | 2015 |

On the Hausdorff distance between the Heaviside step function and Verhulst logistic function N Kyurkchiev, S Markov Journal of Mathematical Chemistry 54 (1), 109-119, 2016 | 200 | 2016 |

On the approximation of the step function by some sigmoid functions A Iliev, N Kyurkchiev, S Markov Mathematics and Computers in Simulation 133, 223-234, 2017 | 179 | 2017 |

On directed interval arithmetic and its applications S Markov J. UCS The Journal of Universal Computer Science: Annual Print and CD-ROM …, 1996 | 165 | 1996 |

Extended interval arithmetics: new results and applications NS Dimitrova, SM Markov, ED Popova Computer arithmetic and enclosure methods, 225-232, 1992 | 113 | 1992 |

Some applications of extended interval arithmetic to interval iterations SM Markov Fundamentals of Numerical Computation (Computer-Oriented Numerical Analysis …, 1980 | 100 | 1980 |

On the algebraic properties of convex bodies and some applications S Markov Journal of convex analysis 7 (1), 129-166, 2000 | 80 | 2000 |

Extended interval arithmetic involving infinite intervals SM Markov Math. Balkanika, New Ser 6, 269-304, 1992 | 74 | 1992 |

On the chemical meaning of some growth models possessing Gompertzian‐type property R Anguelov, M Borisov, A Iliev, N Kyurkchiev, S Markov Mathematical Methods in the Applied Sciences 41 (18), 8365-8376, 2018 | 73 | 2018 |

Some techniques for recurrence generating of activation functions N Kyurkchiev, A Iliev, S Markov LAP LAMBERT Academic Publishing, 2017 | 73 | 2017 |

An iterative method for algebraic solution to interval equations S Markov Applied Numerical Mathematics 30 (2-3), 225-239, 1999 | 73 | 1999 |

On the approximation of the cut and step functions by logistic and Gompertz functions AI Iliev, N Kyurkchiev, S Markov Biomath 4 (2), ID: 1510101-ID: 1510101, 2015 | 71 | 2015 |

A note on the Log-logistic and transmuted Log-logistic models. Some applications S Markov, A Iliev, A Rahnev, N Kyurkchiev Dynamic Systems and Applications 27 (3), 593-607, 2018 | 66 | 2018 |

The set of Hausdorff continuous functions—the largest linear space of interval functions R Anguelov, S Markov, B Sendov Reliable Computing 12 (5), 337-363, 2006 | 62 | 2006 |

On quasilinear spaces of convex bodies and intervals S Markov Journal of Computational and Applied Mathematics 162 (1), 93-112, 2004 | 59 | 2004 |

On the approximation of the generalized cut functions of degree p+ 1 by smooth hyper-log-logistic function S Markov, N Kyurkchiev, A Iliev, A Rahnev Dynamic Systems and Applications 27 (4), 715-728, 2018 | 53 | 2018 |

Hausdorff continuous interval functions and approximations R Anguelov, S Markov Scientific Computing, Computer Arithmetic, and Validated Numerics: 16th …, 2016 | 52 | 2016 |

Some Techniques for Recurrence Generating of Activation Functions: Some Modeling and Approximation Aspects N Kyurkchiev, A Iliev, S Markov Lap Lambert Academic Publishing, 2017 | 51 | 2017 |

The contribution of T. Sunaga to interval analysis and reliable computing S Markov, K Okumura Developments in Reliable Computing, 167-188, 1999 | 51 | 1999 |