Impact of COVID-19 Restriction Measures on Ambient PM10 Concentrations during Universiti Putra Malaysia ConvocationMuhammad ‘Afif Fayyadh Fauzi, Nazatul Syadia Zainordin, Mohammad Ammar Izzan Mohd Amran, Siti Khadijah Khairuddin, Jenny Awalina Jeff and Dominik JimeBIO Web Conf., 73 (2023) 05021DOI: https://doi.org/10.1051/bioconf/20237305021