Johnston TM, Davis PJ. The occasional bougie-assisted cricothyroidotomy. Can J Rural Med [serial online] 2020 [cited 2019 Dec 23];25:41-8. Available from: http://www.cjrm.ca/text.asp?2020/25/1/41/273534
Hopefully not a very frequently required procedure but a nice, easy to follow description – for when the time comes on the side of road or in hospital.
You can download the ‘blueprint’ and print a 3D larynx to practice on.