Kinney, PL, Gatari, M., Volavka-Close, N., Ngo, N., Ndiba, PK., Law, A., Gachanja, A., Mwaniki, S., Chillurd, SN., Scalar, E. 2011: "Traffic Impacts on PM2.5 Air Quality in Nairobi, Kenya,” Environmental Science and Policy, 14, p. 369-78.

Ngo N.S. and Pataki D.E. 2008: "The energy and mass balance of Los Angeles County."Urban Ecosystems, 11, 2, 121-139.