Potential Natural Aromatase Blockers on Enhance the Frequency and Sound Quality of Male CanariesPudji Astuti, Claude M. Airin, Alfarisa Nurrurozi, Rizal Aidi, Amelia Hana, Susilo Hadi and Harimurti HarimurtiE3S Web Conf., 151 (2020) 01024DOI: https://doi.org/10.1051/e3sconf/202015101024