Reference:
Demirel, D., Butler, K. L., Halic, T., Sankaranarayanan, G., Spindler, D., Cao, C., Petrusa, E., Molina, M., Jones, D. B., and De, S. (2016). A hierarchical task analysis of cricothyroidotomy procedure for a virtual airway skills trainer simulator.
The American Journal of Surgery. 212(3), 475-484.