Gurung, K., and S. Manivannan. “Morphological Characterization and Secondary Metabolites Profile of Black Pepper (Piper Nigrum L.) Genotypes from Sikkim”. Journal of Spices and Aromatic Crops, vol. 29, no. 2, Dec. 2020, pp. 98-104, doi:10.25081/josac.2020.v29.i2.6347.