Carole L. Marcus, Sandra England, Robert D. Annett, Lee J. Brooks, Robert T. Brouillette, Carroll JL, Carol L. Rosen, Gerald Rosen, Daivd Tunkel. Cardiorespiratory Sleep Studies in Children: Establishment of Normative Data and Polysomnographic Predictors of Morbidity. Am J Respir Crit Care Med. 1999; 160(4):1381-1387.