TY  - RPRT
TI  - A new model for discrete character evolution.
AU  - A Grafen
AU  - M Ridley
PY  - 1997
DO  - 10.1006/jtbi.1996.0269
UR  - https://pubmed.ncbi.nlm.nih.gov/9039396/
ID  - 9039396
ER  -