Maskey MK, Baral KP, Shah R, Shrestha BD, Lang J, Rothman KJ. Field test results of the motherhood method to measure maternal mortality. Ind Med Gaz. 2011 Jan 1;133(1):64-9.
Grzywacz JG, Quandt SA, Early J, Tapia J, Graham CN, Arcury TA. Leaving Family for Work: ambivalence and Mental Health Among Mexican Migrant Farmworker Men. J Immigr Minor Health. 2006 Jan 1;8(1):85-97.
Derby CA, Araujo AB, Johannes CB, Feldman HA, McKinlay JB. Measurement of erectile dysfunction in population-based studies: the use of a single question self-assessment in the Massachusetts Male Aging Study. Int J Impot Res. 2000 Aug 1;12(4):197-204.