C. Calzolari, F. Ungaro, P. Salvador, and D. Torri, 2009, Effect of compost supplies on soil bulk density and aggregate stability. Results from a six years trial in two experimental fields in Northern Italy, EGU General Assembly 2009, Vienna, 2009,
URL: http://www.cnr.it/prodotto/i/118406

Data from https://intranet.cnr.it/people/