R. Poobathy, N. Izwa, A. L. Julkifle, and S. Subramaniam, “CRYOPRESERVATION OF DENDROBIUM SONIA-28 USING AN ALTERNATIVE METHOD OFPVS2 DROPLET FREEZING”, Emir J Food Agric, vol. 25, no. 7, pp. 531–538, May 2013.