Development of Smart Trolley System Based on Android Smartphone Sensors. - Alexander Agung Santoso Gunawan; Valdi Stevanus; Albertus Farley; Heri Ngarianto; Widodo Budiharto; Herman Tolle; Muhammad Attamimi (ICCSCI, 2019)

Automated English Digital Essay Grader Using Machine Learning. - Yafet Salim; Valdi Stevanus; Edwardo Barlian; Azani Cempaka Sari; Derwin Suhartono (TALE, 2019)