Unix creator Dennis Ritchie dies aged 70. BBC News (13 қазан 2011). — «Pioneering computer scientist Dennis Ritchie has died after a long illness. ... The first news of Dr Ritchie's death came via Rob Pike, a former colleague who worked with him at Bell Labs. Mr Ritchie's passing was then confirmed in a statement from Alcatel Lucent which now owns Bell Labs.» Тексерілді, 14 қазан 2011.
