The Conceptual Programming Environment, CP: Reasoning Representation using Graph Structures and Operations. - Heather Pfeiffer; Roger T. Hartley (VL, 1991)

Knowledge Representation and Control in "gm1", an Automated DNA Sequence Analysis System Based on the MGR Architecture. - Chris A. Fields; Heather D. Pfeiffer; Thomas C. Eskridge (Int. J. Man Mach. Stud., 1991)

e-MGR: An Architecture for Symbolic Plasticity. - M. J. Coombs; Heather D. Pfeiffer; Roger T. Hartley (Int. J. Man Mach. Stud., 1992)

MERCURY: A Heterogeneous System for Spatial Extrapolation for Mesoscale Meteorological Data. - Chris A. Fields; J. E. Newberry; Heather D. Pfeiffer; C. A. Soderlund; Stephen F. Kirby; G. B. McWilliams (Int. J. Man Mach. Stud., 1992)

Temporal, spatial, and constraint handling in the Conceptual Programming environment, CP. - Heather D. Pfeiffer; Roger T. Hartley (J. Exp. Theor. Artif. Intell., 1992)

Visual Representation of Procedural Knowledge. - Roger Hartley; Heather Pfeiffer (VL, 2000)

An Exportable CGIF Module from the CP Environment: A Pragmatic Approach. - Heather D. Pfeiffer (ICCS, 2004)

Games of Inquiry for Collaborative Concept Structuring. - Mary A. Keeler; Heather D. Pfeiffer (ICCS, 2005)

Collaboratory testbed partnerships as a knowledge capture challenge. - Mary A. Keeler; Heather D. Pfeiffer (K-CAP, 2005)

Games for co-evolution of digital resources and knowledge tools. - Mary A. Keeler; Heather D. Pfeiffer (ASIST, 2006)

Building a Pragmatic Methodology for KR Tool Research and Development. - Mary A. Keeler; Heather D. Pfeiffer (ICCS, 2006)

A Comparison of Different Conceptual Structures Projection Algorithms. - Heather D. Pfeiffer; Roger T. Hartley (ICCS, 2007)

Representation Levels Within Knowledge Representation. - Heather D. Pfeiffer; Joseph J. Pfeiffer Jr. (ICCS, 2007)

Tagging as a communication device: Every tag cloud has a silver lining. - Heather D. Pfeiffer; Emma Tonkin; Mark R. Lindner; David R. Millen; Margaret E. I. Kipp (ASIST, 2008)

Speed Meeting: A special session to introduce attendees to each other in person and via Web cast. - Deborah E. Swain; Beatrice Pulliam; Kris Liberman; Diane Neal; Christopher Landbeck; Phillip M. Edwards; Deborah Barreau; Julie Hersberger; Leona Faust; Heather Pfeiffer (ASIST, 2008)

Knowledge sharing and management in open access e-resources & communities. - Qiping Zhang; Thomas Krichel; Cheryl Malone; Heather D. Pfeiffer; Sarah L. Shreeves (ASIST, 2008)

Clusters and constellations: Untwisting shortened links. - Emma Tonkin; Heather D. Pfeiffer (ASIST, 2012)

Analyzing Clusters and Constellations from Untwisting Shortened Links on Twitter Using Conceptual Graphs. - Emma Tonkin; Heather D. Pfeiffer; Gregory J. L. Tourte (ICCS, 2013)

Zombies Walk Among Us: Cross-Platform Data Mining for Event Monitoring. - Emma Tonkin; Heather D. Pfeiffer (ICDM Workshops, 2013)

Career Development in Knowledge Management. - Jeff Allen; Lu An; Darra L. Hofman; Md. Anwarul Islam; Heather D. Pfeiffer (ASIST, 2021)