On making form, Kimoon Publisher, Seoul (in Korean), 2015

Folding techniques for designers : from sheet to form, Archigram Publisher, Seoul, 2013 (Translation, in Korean)

Architectural graphics, 4th Edition, Archigram Publisher, Seoul, 2005 (Translation)

For an architecture of reality, Migun Publisher, Seoul 2002 (Translation)

Journals, dissertation, conference Papers (peer-reviewed)

CAD Beyond Geometry (Journal manuscript in preparation, CAD)

A Computable Language of Architecture: Towards Building Descriptive Models of Spatial Qualities, PhD dissertation, Carnegie Mellon University, 2012 [preview in ProQuest]

A Computable Language of Architecture: Description of Descriptor Language in Supporting Compound Definitions, Key,S., Proc. Association for Education and Research in Computer Aided Architectural Design in Europe (eCAADe), Istanbul, Turkey Sep 16-19, 2009 [pdf]

Computing Spatial Qualities in Architecture, Key, S., Do, E. Y-L., Gross, M., Proc. Association for Computer Aided Design in Architecture (ACADIA), Minneapolis, MN Oct 15-17, 2008 [pdf]