TY  - RPRT
TI  - Problem-solving as dependent on availability of functions.
AU  - P SAUGSTAD
PY  - 1955
DO  - 10.1111/j.2044-8295.1955.tb00539.x
UR  - https://pubmed.ncbi.nlm.nih.gov/13250157/
ID  - 13250157
ER  -