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- Kovalchuk, A. N. 1
- Kovalchuk, E. A. 1
- Kovalchuk, G. V. 2
- Kovalchuk, I. V. 2
- Kovalchuk, K. 1
- Kovalchuk, O. K. 1
- Kovalchuk, S. I. 1
- Kovalchuk, V. M. 6
- Kovalec, V. V. 1
- Kovalenko, A. I. 4
- Kovalenko, A. S. 2
- Kovalenko, A. U. 1
- Kovalenko, A. V. 1
- Kovalenko, O. 1
- Kovalenko, S. A. 1
- Kovalenko, T. N. 2
- Kovalenko, Yu. S. 2
- Kovalenko, Yu. V. 1
- Kovalenok, D. G. 1
- Kovalenok, S. V. 1