Gascon M, Cirach M, Martinez D, Dadvand P, Valentin A, Plasencia A, Nieuwenhuijsen MJ. Normalized difference vegetation index (NDVI) as a marker of surrounding greenness in epidemiological studies: the case of Barcelona city. Urban For Urban Green. 2016 Sep;19:88-94. doi: 10.1016/j.ufug.2016.07.001
Cates SC, Kosa KM, Karns S, Godwin SL, Speller-Henderson L, Harrison R, Ann Draughon F. Food safety knowledge and practices among older adults: identifying causes and solutions for risky behaviors. J Nutr Elder. 2009 Apr;28(2):112-26. doi: 10.1080/01639360902949986