Towards unobtrusive sleep stage classification in preterm infants using machine learning. - Nathalie Demme; Maha Shadaydeh; Laura Schieder; Claus Doerfel; Stella Jähkel; Knut Holthoff; Hans Proquitté; Joachim Denzler; Jürgen Graf 004 (Biomed. Signal Process. Control., 2025)