F. Maddalena, S. Solimini: Transport distances and irrigation models (Preprint) 2007 G. Buttazzo, A. Pratelli, S. Solimini, E. Stepanov: Optimal urban networks via mass transportation Springer Lecture Notes in Mathematics Vol. 1961, p. 160 pp., 2009 A. Brancolini, S. Solimini: On the Holder Regularity of the Landscape Function Interfaces Free Bound. Vol. 13, N. 2, p. 191-222, 2011 F. Maddalena, S. Solimini: Synchronic and Asynchronic Descriptions of Irrigation Problems (Submitted Paper) 2013 A. Brancolini, S. Solimini: Fractal regularity results on optimal irrigation patterns J. Math. Pures Appl. Vol. 102, p. 854-890, 2014