TRIZ based approach to improve public bus service quality. - Christina Wirawan; Astrid P. Ayu (IEEM, 2014)

Value Co-creation Building to Sustain Indonesian MSMEs in the New Normal Era. - Christina Wirawan; Jahja Hamdani Widjaja (IEEM, 2021)

Analysis of The Potential Packaging Solution for Madura Satay Based on Customer's Preferences. - E. Sarvia; Christina Wirawan; N. Sulandari; P. P. Yapinus; M. Tanubrata; G. K. Salim; T. P. Ismail (IEEM, 2024)

Private Shopping Trolley Design to Raise Customers' Convenience and Increase Supermarkets' Income. - Christina Wirawan; E. Sarvia; W. Yudiantyo; Martin (IEEM, 2024)