González-Barahona, Jesús M., Miguel A. Ortuño Pérez, Pedro de las Heras Quirós, José Centeno González, and Vicente Matellán Olivera. Counting potatoes: the size of Debian 2.2. debian.org. [2003-08-12]. （原始内容存档于2008-05-03）.
Debian 7.0 was released in May 2013. The number is an estimate published on 2012-02-13, using the code base which would become Debian 7.0, using the same software method as for the data published by David A. Wheeler. James Bromberger. Debian Wheezy: US$19 Billion. Your price… FREE!. [2014-02-07]. （原始内容存档于2014-02-23）.
usc.edu
sunset.usc.edu
Vu Nguyen; Sophia Deeds-Rubin; Thomas Tan; Barry Boehm, A SLOC Counting Standard(PDF), Center for Systems and Software Engineering, University of Southern California, 2007 [2020-01-10], （原始内容(PDF)存档于2012-04-17）
web.archive.org
Vu Nguyen; Sophia Deeds-Rubin; Thomas Tan; Barry Boehm, A SLOC Counting Standard(PDF), Center for Systems and Software Engineering, University of Southern California, 2007 [2020-01-10], （原始内容(PDF)存档于2012-04-17）
González-Barahona, Jesús M., Miguel A. Ortuño Pérez, Pedro de las Heras Quirós, José Centeno González, and Vicente Matellán Olivera. Counting potatoes: the size of Debian 2.2. debian.org. [2003-08-12]. （原始内容存档于2008-05-03）.
Debian 7.0 was released in May 2013. The number is an estimate published on 2012-02-13, using the code base which would become Debian 7.0, using the same software method as for the data published by David A. Wheeler. James Bromberger. Debian Wheezy: US$19 Billion. Your price… FREE!. [2014-02-07]. （原始内容存档于2014-02-23）.
