TY  - RPRT
TI  - Training under two drives, alternately present, vs. training under a single drive.
AU  - L W PORTER
AU  - N E MILLER
PY  - 1957
DO  - 10.1037/h0043552
UR  - https://pubmed.ncbi.nlm.nih.gov/13449242/
ID  - 13449242
ER  -