Saputro, Wahyu Ardian, and Mohammad Suryawinata. “Online Survey Application System Design Via Telegram at the Bsa Project Surabaya Company: Rancang Bangun Sistem Aplikasi Survei Online Via Telegram Pada Perusahaan Bsa Project Surabaya”. Procedia of Engineering and Life Science, vol. 1, no. 1, Mar. 2021, doi:10.21070/pels.v1i1.759.