1. Nonlinear Regression Analysis and its Applications;Bates,1988
2. Nonlinear Regression Analysis and its Applications;Bates,1988
3. A description of stems: the stand and tree evaluation and modelling system;Belcher;USDA For. Serv. Gen. Tech. Rep.,1982
4. quoted;Biggs,1962
5. Forest Dynamics: An Ecological Model;Botkin,1993