Sobell L C, VanderSpek R, Saltman P
J Stud Alcohol. 1980 Sep;41(9):930-4. doi: 10.15288/jsa.1980.41.930.
Participants in two countermeasures programs for drunken drivers found portable breath alcohol testers useful in making decisions about driving after drinking and said they would continue to use them if they were commercially available.