M.  Kasture, Singh, S., Patel, P., Joy, P. Alias, Prabhune, A., Ramana, C. V., and Prasad, B. L. V., ?Multiutility sophorolipids as nanoparticle capping agents: synthesis of stable and water dispersible Co nanoparticles?, Langmuir, vol. 23, no. 23, pp. 11409-11412, 2007.