Claudio Cobelli A. Lepschy G. Romanin-Jacur Structural Identifiability of Biological Compartmental Systems. 88-102 1975 conf/ifip7/1975-1 Optimization Techniques db/conf/ifip7/ifip7-1975-1.html#CobelliLR75 http://dx.doi.org/10.1007/3-540-07622-0_463