TY  - RPRT
TI  - Proposed universal standard for specifying schedules.
AU  - R F Kallman
PY  - 1991
DO  - 10.1016/0360-3016(91)90309-r
UR  - https://pubmed.ncbi.nlm.nih.gov/1938546/
ID  - 1938546
ER  -