La Citadelle, Ontario, Canada

• http://www.la-citadelle.com/mathematics/lagrange/lagrange5.html
• http://www.la-citadelle.com/courses/calculus/From_Rate_of_Change_to_Derivative.html
• http://www.la-citadelle.com/mathematics/euclid/euclid07.html
• http://www.la-citadelle.com/courses/calculus/
• http://www.la-citadelle.com/mathematics/gauss/gauss08.html
• http://www.la-citadelle.com/mathematics/poisson/hypergeometric_distribution3.html
• http://www.la-citadelle.com/mathematics/tig/calculator08.html
• http://www.la-citadelle.com/courses/mhf4u/
• http://www.la-citadelle.com/physics/electric_circuits3.html
• http://www.la-citadelle.com/physics/relative11.html
• http://www.la-citadelle.com/mathematics/vectors_calculator/
• http://www.la-citadelle.com/mathematics/the_book_of_fractions.pdf
• http://www.la-citadelle.com/mathematics/the_book_of_integers.pdf
• http://www.amazon.com/Teodoru-Gugoiu/e/B001K88JI6
• http://www.la-citadelle.com/courses/calculus/top_ten.pdf