Mabee, S. B. & Kopera, J. P. Fracture patterns across two terrane boundaries in eastern Massachusetts; implications for regional groundwater flow and recharge. Abstracts with Programs - Geological Society of America 38, 434 - 434 (2006).

Kopera, J. P. & Mabee, S. B. A new way of looking at, and mapping, bedrock; the hydrostructural domain map of the Ayer Quadrangle, northeastern Massachusetts. Abstracts with Programs - Geological Society of America 38, 166 - 166 (2006).

Kopera, J. P. & Massey, M. A. A structural framework for the Nashoba Terrane in eastern Massachusetts. Abstracts with Programs - Geological Society of America 45, 107 (2013).