Sarker, M. M. R. 2012. “Induction of Humoral Immunity Through the Enhancement of IgM Production in Murine Splenic Cells by Ethanolic Extract of Seed of <i>Piper nigrum< I> L”. Journal of Scientific Research 4 (3):751-56. https://doi.org/10.3329/jsr.v4i3.10485.