TY  - RPRT
TI  - The time has come for evolution from the circle breathing system.
AU  - B A Simon
AU  - M A Lovich
AU  - N Sims
AU  - J B Cooper
PY  - 1993
DO  - 10.1007/bf01627639
UR  - https://pubmed.ncbi.nlm.nih.gov/8463807/
ID  - 8463807
ER  -