TY  - RPRT
TI  - A scheme for the future.
AU  - C Smit Sibinga
PY  - 1984
DO  - 10.1111/j.1600-0609.1984.tb02614.x
UR  - https://pubmed.ncbi.nlm.nih.gov/6433477/
ID  - 6433477
ER  -