G. Yilmaz, H. Akbas, F. Dane, S. Leventer, and F. Ozturk, “Micellization and Related Behaviours of Polyoxyethylene-Type Non-ionic Surfactants on Root Elongation of Allium cepa L”., ajc, vol. 24, no. 12, pp. 5743–5745, Aug. 2012.