Katarina Kovacova, Genc Berisha, Katarina Stebelova, Alena Cernackova, Ludmila Oreska, Milan Sedliak, Michal Zeman, Monika Okuliarova. "Age-related differences in circadian timing system and sleep quality in young and older lifelong endurance runners." Scientific Reports, 2026. doi:10.1038/s41598-026-56087-3