*{{en}}[cita web|http://www.damtp.cam.ac.uk/user/db275/LeastAction.pdf|Daniel D. Baumann - Principle of Least Action]|lingua=en}}
*{{en}}[cita web|http://yima.csl.illinois.edu/psfile/ECE553/FeynmanLecturesOnPhysicsChapter2-19.pdf|Feynman - Lectures On Physics - Chapter 2]|lingua=en}}
*{{en}}[cita web|http://www.eftaylor.com/software/ActionApplets/LeastAction.html|Interactive explanation of the principle of least action]|lingua=en}}
*{{en}}[cita web|http://www.eftaylor.com/software/ActionClockTicks/|Interactive applet to construct trajectories using principle of least action]|lingua=en}}
*{{en}}cita [web|http://math.ucr.edu/home/baez/classical/texfiles/2005/book/classical.pdf|John C. Baez - Lectures on Classical Mechanics]|lingua=en}}
