H. R. Pentela, S. Dingezweni, și H. J. Moutlana, „An An audit of difficult airway trolleys at central and tertiary hospitals affiliated with the University of the Witwatersrand. A cross-sectional study.: Evaluation of Difficult airway trolleys”, SJHR-Africa, vol. 7, nr. 3, p. 10, sep. 2026, doi: 10.51168/kkz7tj91.