1. Alburquerque JA, Gonzálvez J, García D, Cegarra J (2007) Effects of a compost made from the solid by-product (‘‘alperujo”) of the two phase centrifugation system for olive oil extraction and cotton gin waste on growth and nutrient content of ryegrass (Lolium perenne L.). Bioresour Technol 98(4):940–945
2. Altieri R, Pepi M, Esposito A, Fontanazza G (2005) Chemical and microbiological characterization of olive mill wastes based substrata produced by the (O.Mi.By.P.) technology (Olive Mill By-Products Processor) and their grounds amendment, in Proceedings International Seminar: “The role and importance of integrated soil and water management for orchards development”, 9–10 May 2004, Mosciano S. Angelo (TE), Italy, FAO Land and Water Bulletin 10:91-101
3. Altieri R, Esposito A con la collaborazione di Pepi M, Lobianco A, Stendardi A, Gasparini S, Perini C, Pecoraro L, Castagnini P (2008) Soluzioni alternative allo spandimento in campo dei sottoprodotti dei frantoi, Cantagalli S.r.l. Siena, p 66
4. Anderson MJ (2001) A new method for non-parametric multivariate analysis of variance. Austral Ecol 26:32–46
5. Anderson MJ (2004) CAP: a FORTRAN computer program for canonical analysis of principal coordinates. Department of Statistics, University of Auckland, New Zealand