Smart Interactive Virtual Assistant System for Office Door Applications in the Situation of the COVID-19 Pandemic. - Muhammad Zharif Aiman Alias; Wan Norsyafizan W. Muhamad; Nurain Izzati Shuhaimi; Darmawaty Mohd Ali; Azlina Idris (J. Robotics Netw. Artif. Life, 2022)