1. http://www.sercel.com/products/Lists/ProductSpecification/508XT_brochure_Sercel.pdf
2. Kinemetrics EpiSensor ES-T Force Balance Accelerometer Datasheethttp://www.kinemetrics.com/uploads/PDFs/ES-T%20Datasheet.pdf
3. CMG-5T Strong Motion Feedback Accelerometerhttp://www.guralp.com/documents/DAS-050-0001.pdf
4. Seismic Accelerometers for Unattended Ground Sensors (UGS)http://www.ims-i.za.com/pdf/30N.UGS.B.05.11.pdf
5. Colibrys Si-FlexTM Series Product Descriptionhttp://www.colibrys.com/files/pdf/products/PD%20SiFlex%2030D.SFX.D.03.09.pdf