weSPOT: A Cloud-based Approach for Personal and Social Inquiry. - Alexander Mikroyannidis; Alexandra Okada; Peter Scott; Ellen Rusman; Marcus Specht; Krassen Stefanov; Aristos Protopsaltis; Paul Held; Sónia Hetzner (WCLOUD, 2012)

weSPOT: A Personal and Social Approach to Inquiry-Based Learning. - Alexander Mikroyannidis; Alexandra Okada; Peter Scott; Ellen Rusman; Marcus Specht; Krassen Stefanov; Pavel Boytchev; Aristidis Protopsaltis; Paul Held; Sónia Hetzner; Kathy Kikis-Papadakis; Foteini Chaimala (J. Univers. Comput. Sci., 2013)

Mobile Learning Concepts for Older Adults: Results of a Pilot Study with Tablet Computers in France and Germany. - Eline Leen-Thomele; Sónia Hetzner; Paul Held (HCI (25), 2016)