Vejayan, J. et al. 2024. Glycoproteins Isolated from Tongkat Ali Plants Capable to Elevate Testosterone in both in vitro and in vivo Experiments . Tropical Journal of Natural Product Research (TJNPR). 8, 6 (Jun. 2024), 7303–7309. DOI:https://doi.org/10.26538/tjnpr/v8i6.41 .