Development of a Concept for Evaluation User Acceptance and Requirements for NFC Based E-ticketing in Public Transport. - Gertraud Schäfer; Andreas Kreisel; Denise Rummler; Ulrike Stopka (HCI (2), 2017)

NFC-Enabled eTicketing in Public Transport - Aims, Approaches and First Results of the OPTIMOS Project. - Ulrike Stopka; Gertraud Schäfer; Andreas Kreisel (HCI (2), 2017)

Nutzeranforderungen an mobile Applikationen für NFC-basierte eTickets im ÖPNV. - Andreas Kreisel; Denise Rummler; Gertraud Schäfer; Ulrike Stopka (MKWI, 2018)

Business and Billing Models for Mobile Services Using Secure Identities. - Ulrike Stopka; Gertraud Schäfer; Andreas Kreisel (HCI (31), 2019)

Acceptance and Diffusion of Services Based on Secure Elements in Smartphones - Study Design and First Results of the Pretests. - Andreas Kreisel; Gertraud Schäfer; Ulrike Stopka (HCI (32), 2020)

On the Remarkable Superconductivity of FeSe and Its Close Cousins. - Andreas Kreisel; Peter J. Hirschfeld; Brian M. Andersen (Symmetry, 2020)

Usability Study of an Innovative Application in Public Transport by Using Hardware-Based Security Technology. - Gertraud Schäfer; Andreas Kreisel; Ulrike Stopka (HCI (30), 2021)