Optimization of Javanese Long Pepper (Piper retrofractum Vahl) extract nanoparticles as an aphrodisiac preparationAskur Rahman, Sumardi Hadi Sumarlan, Sukardi and Dodyk PranowoE3S Web Conf., 499 (2024) 01014DOI: https://doi.org/10.1051/e3sconf/202449901014