Links
[1] http://design.rootiers.it/strutture/taxonomy/term/2
[2] http://design.rootiers.it/strutture/taxonomy/term/16
[3] http://design.rootiers.it/strutture/sites/default/files/users/Giulia_Spagnuolo/SdC%28b%29_%28LM_PA%29/2014/dimensionamento%20travi%20c.a%2C%20legno%20e%20acciaio.pdf