A multipoint problem for partial integro-differential equations by Vasylyshyn, P. B., Ptashnik, B. I., Василишин, П. Б., Пташник, Б. Й.

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Multipoint problem for hyperbolic equations with variable coefficients by Vasylyshyn, P. B., Klyus, I. S., Ptashnik, B. I., Василишин, П. Б., Клюс, І. С., Пташник, Б. Й.

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A multipoint problem with multiple nodes for linear hyperbolic equations by Beresnevich, V. V., Bernik, V. I., Vasylyshyn, P. B., Ptashnik, B. I., Бересневіч, В. В., Бернік, В. І., Василишин, П. Б., Пташник, Б. Й.

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