K.B. PUN3 and R.P. MEDHI1, R.P. PANT1, M. DAS1, M.R. KHAN2,. “Association of an Ectoparasitic Nematode- Helicotylenchus Microcephalus, With Poor Growth of Cymbidium Hybrids in Sikkim”. Indian Phytopathology, vol. 65, no. 2, June 2012, pp. 196-7, https://epubs.icar.org.in/index.php/IPPJ/article/view/18588.