J. H. T. Rocha, C. Backes, F. A. Diogo, C. B. Pascotto, and K. Borelli, “Sewage sludge as substrate for seedlings of eucalytpus”, Pesq. flor. bras., vol. 33, no. 73, pp. 27–35, Mar. 2013, doi: 10.4336/2013.pfb.33.73.331.