Sulyok CJ, Fox L, Ritchie H, Lanzas C, Lenhart S, Day J. Mathematically modeling the effect of touch frequency on the environmental transmission of Clostridioides difficile in healthcare settings. Math Biosci. 2021 Oct;340:108666. doi: 10.1016/j.mbs.2021.108666
Mansfield CA, Pattanayak SK, McDow W, MacDonald R, Halpin P. Shades of green: measuring the value of urban forests in the housing market. J Forest Econ. 2005 Dec;11(3):177-99. doi: 10.1016/j.jfe.2005.08.002