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Complex vector functional equations
  • DJVU
  • English
  • Year: 2001
  • Author: Risteski I., Covachev V.
Complex Vector Functional Equations
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  • English
  • Year: 2001
  • Author: Ice Risteski, Valery Covachev
Proceedings of the Third International Colloquium on Numerical Analysis: Plovdiv, Bulgaria, 13–17 August, 1994
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  • English
  • Year: 1995
  • Author: D. Bainov (editor); V. Covachev (editor)
Proceedings of the First International Colloquium on Numerical Analysis: Plovdiv, Bulgaria, 13–17 August 1992
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  • English
  • Year: 1993
  • Author: D. Bainov (editor); V. Covachev (editor)
Proceedings of the Fourth International Colloquium on Differential Equations, Plovdiv, Bulgaria, 18–22 August 1993
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  • English
  • Year: 1994
  • Author: D. Bainov (editor); V. Covachev (editor)
Proceedings of the Second International Colloquium on Numerical Analysis: Plovdiv, Bulgaria, 13–17 August 1993
  • PDF
  • English
  • Year: 1994
  • Author: D. Bainov (editor); V. Covachev (editor)
Proceedings of the Third International Colloquium on Differential Equations, Plovdiv, Bulgaria, 18–22 August 1992
  • PDF
  • English
  • Year: 1993
  • Author: V. Covachev (editor); D. Bainov (editor)
Proceedings of the Fifth International Colloquium on Differential Equations: Plovdiv, Bulgaria, 18–23 August, 1994
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  • English
  • Year: 1995
  • Author: D. Bainov (editor); V. Covachev (editor)
Oscillation theory of operator-differential equations
  • DJVU
  • English
  • Year: 1995
  • Author: D. Bainov, D. P. Mishev, V. Covachev
Impulsive differential equations with a small parameter
  • DJVU
  • English
  • Year: 1994
  • Author: Drumi Bainov, Valery Covachev
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