Doubly Even Self-Dual [40,20,8] Codes with Automorphism of an Odd Order NZ V J Yorgov Probl. Peredachi Inf. 32 (3), Pages 41–46, 1996 | 13 | 1996 |

Embedding obstructions for the generalized quaternion group IM Michailov, NP Ziapkov Journal of Algebra 226 (1), 375-389, 2000 | 10 | 2000 |

Universally concordant Galois extensions NP Ziapkov, AV Yakovlev Zapiski Nauchnykh Seminarov POMI 71, 133-152, 1977 | 6 | 1977 |

On realizability of p-groups as Galois groups NZ I Michailov Serdica Mathematical Journal 37 (3), 173-210, 2011 | 5 | 2011 |

Attendant embedding problems I Michailov, N Ziapkov Comptes Rendus de l'Academie Bulgare des Sciences 53 (7), 7: 9, 2000 | 5 | 2000 |

Some relatives of the dihedral group as Galois groups N Ziapkov CR Acad. Bulgare Sci 62, 1063-1066, 2009 | 4 | 2009 |

Embedding problems with Galois groups of order 16 NZ I. Michailov Mathematica Balkanica, New Series 15 (2), 99-108, 2001 | 4 | 2001 |

On the binary extremal codes of length 92 ZN Dontcheva R., Russeva R. Intern. Workshop on Optimal Codes and Related Topics,Bulgaria,, 53-58, 2001 | 4* | 2001 |

Classification of the binary self-dual codes with automorphisms of order 7 R Russeva, N Yankov, N Ziapkov, M Nikolova Math. Math. Educ, 239-244, 2008 | 3 | 2008 |

The inverse problem of Galois theory I Michailov, N Ziapkov Math. and Education in Math 37, 17-28, 2008 | 3 | 2008 |

Some groups of orders 8 and 16 as Galois groups over the p-adic number field I Michailov Math. Balk. New Series 19, 3-4, 2005 | 3 | 2005 |

A [96; 48; 20] doubly-even selfdual code not have automorphisms of order 47 and 31 ZN Shterev A., Yorgov V. Intern. workshop ACCT, Leningrad,, 191-194, 1990 | 3* | 1990 |

Some relatives of the modular group as Galois groups N Ziapkov Compt. Rend. Acad. Bulg. Sci., to appear, 2009 | 2 | 2009 |

On the Group of a [72; 36; 14] Self-Dual Code YV Ziapkov N Intern. Workshop on Optimal Codes and Related Topics, Bulgaria, 143-145, 1995 | 2* | 1995 |

On equivalent embedding problems I Michailov, N Ziapkov COMPTES RENDUS-ACADEMIE BULGARE DES SCIENCES 53 (8), 9-12, 2000 | 1 | 2000 |

Groups of automorphisms in the Galois Theory and in the Coding Theory Z N P | | 2019 |

Algorithmic generation of isoclinism classes for 4-generator groups of nilpotency class 2, NZ I. Michailov, I. Ivanov Proceedings of Russe University, 21-24, 2015 | | 2015 |

NOETHER’S PROBLEM FOR ABELIAN EXTENSIONS OF BICYCLIC AND METACYCLIC p-GROUPS IM Michailov, IS Ivanov, NP Ziapkov Comptes rendus de l’Académie bulgare des Sciences 67 (6), 2014 | | 2014 |

Noether’s problem for abelian extensions of cyclic and metacyclic p-groups NZ I. Michailov, I. Ivanov International conference " MATHTECH" , Shumen, 1, 26-29, 2012 | | 2012 |

200th Anniversary of the Mathematical Genius Evariste Galois Z N P Nauka 6, 70-73, 2011 | | 2011 |