Gaussian fluctuations of polarization in the region of phase transitions in DMAGaS-DMAAlS ferroelectrics in the framework of the four-state model by Stasyuk, I.V., Velychko, O.V.

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Two-state Bose-Hubbard model in the hard-core boson limit by Stasyuk, I.V., Velychko, O.V.

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Phase separation in lithium intercalated anatase: A theory by Velychko, O.V., Stasyuk, I.V.

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New type phase transitions in the Mitsui model with bimodal random field by Stasyuk, I.V., Velychko, O.V.

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The two-state Bose-Hubbard model in the hard-core boson limit: Non-ergodicity and the Bose-Einstein condensation by Stasyuk, I.V., Velychko, O.V.

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Bose-Einstein condensation and/or modulation of "displacements" in the two-state Bose-Hubbard model by Stasyuk, I.V., Velychko, O.V.

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Phonon-like excitations in the two-state Bose-Hubbard model by Stasyuk, I.V., Velychko, O.V., Vorobyov, O.

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Thermodynamics and dielectric anomalies of DMAAS and DMAGaS crystals in the region of phase transitions (Landau theory approach) by Stasyuk, I.V., Velychko, O.V., Czapla, Z., Czukwinski, R.

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Model description of the H–bonded transuranium complexes by Stasyuk, I.V., Ivankiv, O.L., Velychko, O.V., Holubets, T.V.

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