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 Perfect Form by Don S. Lemons, 03 March, 1997
 Regular Variation by N. H. Bingham, C. M. Goldie, et all August, 1989
 Gammaconvergence for Beginners (Oxford Lecture Series in Mathematics and Its Applications, 22) by Andrea Braides, October, 2002
 Tensors, Differential Forms, and Variational Principles by David Lovelock, Hanno Rund, May, 1989
 Calculus of Variations, With Applications to Physics and Engineering by Robert Weinstock, June, 1974
 The Parsimonious Universe: Shape and Form in the Natural World by Stefan Hildebrandt, Anthony Tromba, October, 1996
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