TY  - RPRT
TI  - Generalization versus specialization in plant pollination systems.
AU  - SD Johnson
AU  - KE Steiner
PY  - 2000
DO  - 10.1016/s0169-5347(99)01811-x
UR  - https://pubmed.ncbi.nlm.nih.gov/10717682/
ID  - 10717682
ER  -