TY  - RPRT
TI  - Higher-level systematic analysis of birds: current problems and possible solutions.
AU  - Scott E Stanley
AU  - Joel L Cracraft
PY  - 2002
DO  - 10.1007/978-3-0348-8114-2_3
UR  - https://pubmed.ncbi.nlm.nih.gov/11924502/
ID  - 11924502
ER  -