H. R. Pentela, S. Dingezweni, and 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, no. 3, p. 10, Sep. 2026, doi: 10.51168/kkz7tj91.