Risks Associated with the Market Behaviour of Bulgarian Industrial Enterprises von Z. S. Ivanova

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Express-evaluation of the resonance frequencies of machine components by the method of oscillating frequency von A. E. Bozhko, Z. A. Ivanova

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Composition, structure and thermal stability of exchangeable cations hydrates of saponite von Ju. I. Tarasevich, V. E. Poljakov, Z. G. Ivanova, Ju. Trifonova

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