Central lines in general
- http://egret.psychol.cam.ac.uk/medicine/Central_line_insertion.pdf
- http://www.nda.ox.ac.uk/wfsa/html/u12/u1213_01.htm
- http://www.proceduresconsult.com/medical-procedures/central-venous-line-placement-AN-procedure.aspx
Internal jugular lines
- http://www.anwresidency.com/simulation/guide/ij.html