9Tiquia S M, Tam N.EY., Hod gloss I.J.Effects of turning frequency on composting of spent pig manure sawdust litter[J]. Biores.Technol., 1997, (62): 37--42.
10O'brien J R. The Flexible in-vessel composting system[J].Wastes Utilization, 1997, 4(1): 20--33.