A multi-level static memory cell. - Philipp Häfliger; Håvard Kolle Riis (ISCAS (1), 2003)

Spike based learning with weak multi-level static memory. - Håvard Kolle Riis; Philipp Häfliger (ISCAS (5), 2004)

An Asynchronous 4-to-4 AER Mapper. - Håvard Kolle Riis; Philipp Häfliger (IWANN, 2005)

AER Building Blocks for Multi-Layer Multi-Chip Neuromorphic Vision Systems. - Rafael Serrano-Gotarredona; Matthias Oster; Patrick Lichtsteiner; Alejandro Linares-Barranco; Rafael Paz-Vicente; Francisco Gomez-Rodriguez; Håvard Kolle Riis; Tobi Delbruck; Shih-Chii Liu; S. Zahnd; Adrian M. Whatley; Rodney J. Douglas; et al. (NIPS, 2005)