Kopera, J. P., Williams, M. L. & Jercinovic, M. J. Age-constraints on fabric reactivation in the Tusas Range, northern New Mexico, using electron-microprobe monazite geochronology; implications for the nature of regional approximately 1400 Ga deformation. Abstracts with Programs - Geological Society of America 34, 180 - 180 (2002).

Williams, M. L., Jercinovic, M. J., Mahan, K. & Kopera, J. P. Microprobe monazite geochronology; new refinements and new tectonic applications. Abstracts with Programs - Geological Society of America 35, 22 - 23 (2003).

Kopera, J. P., Williams, M. L. & Jercinovic, M. J. Monazite geochronology of Proterozoic quartzites; a powerful tool for understanding reactivation of continental lithosphere in the Southwestern United States. Abstracts with Programs - Geological Society of America 34, 26 - 26 (2002).

Kopera, J. P., Williams, M. L. & Jercinovic, M. J. Monazite geochronology of the Ortega Quartzite: documenting the extent of 1.4 Ga tectonism in northern New Mexico and across the orogen. Abstracts with Programs - Geological Society of America 34, 10 - 10 (2002).

Kopera, J. P., Williams, M. L. & Jercinovic, M. J. Monazite geochronology of the Proterozoic Ortega Quartzite; documenting the extent of 1.4 Ga tectonism in the Tusas Range and beyond. New Mexico Geology 24, 59 - 59 (2002).