Just a few of the papers using PQLX and SQLX as an important part of their analysis:

Damiano Pesaresi, Pier Luigi Bragato, and Giorgio Durì. “Real time seismic monitoring in South-Central Europe: data sharing, cooperation and improvements of the OGS NI Seismic Network”. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale – OGS, Udine, Italy and Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy.

F. Brenguier, P. Kowalski, T. Staudacher, V. Ferrazzini, F. Lauret, P. Boissier, P. Catherine, A. Lemarchand, C. Pequegnat, O. Meric, C. Pardo, A. Peltier, S. Tait, N. M. Shapiro, M. Campillo, and A. Di Muro. “First Results from the UnderVolc High Resolution Seismic and GPS Network Deployed on Piton de la Fournaise Volcano”. Observatoire Volcanologique du Piton de la Fournaise, La Reunion, France. (2012)

Cleiton Kefrof Pavan, Afonso Emidio de Vasconcelos Lopes, and José Roberto Barbosa. “Controle de Qualidade de Dados Sismológicos Utilizando o PQLX”. Sociedade Brasileira de Geofísica, Rio de Janeiro, Brazil. (2011)

Marlon Pirchiner, Bruno Collaço, Jackson Calhau, Marcelo Assumpção, and João Carlos Dourado. “The BRAzilian Seismographic Integrated Systems (BRASIS): infrastructure and data management”. Institute of Astronomy, Geophysics and Atmospheric Sciences (IAG), University of São Paulo (USP), Brazil and Institute of Geosciences and Exact Sciences (IGCE), State University of São Paulo (UNESP), Brazil. (2010)

J. Díaz , A. Villaseñor, J. Gallart, J. Morales, A. Pazos, D. Córdoba, J. Pulgar, J.L. García-Lobón, M. Harnafi, and TopoIberia Seismic Working Group. “The IBERARRAY broadband seismic network: A new tool to investigate the deep structure beneath Iberia”. Observatories and Research Facilities for European Seismology. (2010)

Carlo Cauzzi and John Clinton. “A High- and Low-Noise Model for HighQuality Strong-Motion Accelerometer Stations”. Swiss Seismological Service (SED-ETHZ). (2011)

S.J.Rastin, C.P.Unsworth Member IET, K.R.Gledhill, G.G. Coghill, M.Chadwiek, and R.Robinson. “PQLX Noise Model for the URZ station in the Matata Region of New Zealand”. 10th International Conference on Information Science. Lower Hutt, New Zealand. (2010)

Nurcan Meral Ozel, Serdar Kocak, Korhun U. Semin, Ocal Necmioglu, T. Cem Destici, Ugur Teoman, and Robert Kemerait. “Long Term – Real time Background Noise monitoring Around BR235″. Bogazici University Kandilli Observatory and Earthquake Research Institute, Belbasi Nuclear Tests Monitoring Centre. Ankara, Turkey. (2011)

S. J. Rastin, C. P. Unsworth, K. R. Gledhill, and D. E. McNamara. “A Detailed Noise Characterization and Sensor Evaluation of the North Island of New Zealand Using the PQLX Data Quality Control System.” Earthquake Commission of New Zealand. Wellington, New Zealand. (2012)

For even more references, see the Google Scholar Profile for Richard Boaz.