TY  - RPRT
TI  - A remarkable nonlinear invariant for evolution with heterogeneous rates.
AU  - V Ferretti
AU  - D Sankoff
PY  - 1996
DO  - 10.1016/0025-5564(95)00108-5
UR  - https://pubmed.ncbi.nlm.nih.gov/8935956/
ID  - 8935956
ER  -