http://bibliotecavirtual.unl.edu.ar:8180/tesis/bitstream/1/54/1/tesis_definitiva.pdf

http://digital.library.louisville.edu/utils/getfile/collection/etd/id/2206/filename/5003.pdf

http://www.math.upenn.edu/~kirillov/MATH480-F07/tf.pdf

http://www2.warwick.ac.uk/fac/sci/physics/current/teach/module_home/px263/lectures/sefton.pdf

http://science.uniserve.edu.au/school/curric/stage6/phys/stw2004/sefton1.pdf

http://staff.science.uva.nl/~eberg/Antwerpen/MisconceptieArtikelen/Dallas%20misconception%20list.pdf

http://arxiv.org/pdf/1108.4292v2.pdf