R.H. Kelly, W.J. Parton, G.J. Crocker, P.R. Graced, J. Klír, M. Körschens, P.R. Poulton, D.D. Richter,
Simulating trends in soil organic carbon in long-term experiments using the century model Geoderma. ,vol. 81, pp. 75- 90 ,(1997) ,
10.1016/S0016-7061(97)00082-7