POHORILSKA, Natalia, and Alyona KARYBINA. “Sleep Procrastination. Causes and Consequences of Postponed Sleep”. Bulletin of Taras Shevchenko National University of Kyiv. Psychology 1, no. 21 (June 30, 2025): 99–103. Accessed February 14, 2026. https://psychology.bulletin.knu.ua/article/view/4582.