Olofsson, P., Ayres-de-Campos, D., Kessler, J., Tendal, B., Yli, B. M., & Devoe, L. (2014). A critical appraisal of the evidence for using cardiotocography plus ECG ST interval analysis for fetal surveillance in labor. Part I: The randomized controlled trials. Acta Obstet Gynecol Scand.

Olofsson, Per, Diogo Ayres-de-Campos, Jörg Kessler, Britta Tendal, Branka M. Yli, und Lawrence Devoe. "A Critical Appraisal of the Evidence for Using Cardiotocography Plus ECG ST Interval Analysis for Fetal Surveillance in Labor. Part I: The Randomized Controlled Trials." Acta Obstet Gynecol Scand 2014.

Olofsson, Per, et al. "A Critical Appraisal of the Evidence for Using Cardiotocography Plus ECG ST Interval Analysis for Fetal Surveillance in Labor. Part I: The Randomized Controlled Trials." Acta Obstet Gynecol Scand 2014.