SOLVABILITY OF SOME SYSTEMS OF INTEGRO-DIFFERENTIAL EQUATIONS IN POPULATION DYNAMICS DEPENDING ON THE NATALITY AND MORTALITY RATES ArticleVougalter Vitali, Volpert VitalyArnold Mathematical Journal. Том 10. 2024. С. 1-22
BULLETIN OF THE INTERNATIONAL CENTRE OF ART AND EDUCATION JournalПотапов Дмитрий Александрович, Кушаев Нариман Азисович.