Gómez, V., and Maravall, A. (1997a). Guide for Using the Programs TRAMO and SEATS, Beta Version. Madrid: Banco de España.
Gómez, V., and Maravall, A. (1997b). Programs TRAMO and SEATS: Instructions for the User, Beta Version. Madrid: Banco de España.
US Bureau of the Census (2010). X-12-ARIMA Seasonal Adjustment Program, Version 0.3. US Bureau of the Census, Washington, DC. http://www.census.gov/srd/www/x12a/.
US Bureau of the Census (2013). X-13ARIMA-SEATS Reference Manual, Version 1.1. US Bureau of the Census, Washington, DC. http://www.census.gov/ts/x13as/docX13ASHTML.pdf.