TY  - RPRT
TI  - Attentional effort modulated by task difficulty.
AU  - D Urbach
AU  - H Spitzer
PY  - 1995
DO  - 10.1016/0042-6989(94)00305-x
UR  - https://pubmed.ncbi.nlm.nih.gov/7667929/
ID  - 7667929
ER  -