Vázquez, Juan Luis. "FULL ANALYSIS OF SELF-SIMILARITY." The Porous Medium Equation: Mathematical Theory. : Oxford University Press, 2006-10-26. Oxford Scholarship Online. 2007-09-01. Date Accessed 19 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569039.001.0001/acprof-9780198569039-chapter-16>.
Vázquez, J.(2006-10-26). FULL ANALYSIS OF SELF-SIMILARITY. In The Porous Medium Equation: Mathematical Theory. : Oxford University Press. Retrieved 19 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569039.001.0001/acprof-9780198569039-chapter-16.
Vázquez, Juan Luis. "FULL ANALYSIS OF SELF-SIMILARITY." In The Porous Medium Equation: Mathematical Theory. : Oxford University Press, 2006-10-26. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569039.001.0001/acprof-9780198569039-chapter-16.
Vázquez JL. FULL ANALYSIS OF SELF-SIMILARITY. In: Vazquez JL. The Porous Medium Equation: Mathematical Theory. Oxford University Press; 2006. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569039.001.0001/acprof-9780198569039-chapter-16. Accessed May 19, 2013.