Ward, Brian (2015). How Linux works : what every superuser should know (2nd ed.). San Francisco, CA. p. 62. ISBN 978-1-59327-645-4. OCLC 898036651.{{cite book}}: CS1 maint: location missing publisher (link) 978-1-59327-645-4 ↩
"Software status". ata Wiki.[user-generated source] https://ata.wiki.kernel.org/index.php/Software_status ↩