November 2010]. B10743-01. (原始内容存档于2013-03-02). (英文) Jesus Diaz. How Multitasking Works in the New iPhone OS 4.0. Gizmodo. 8 April 2010 [14 November 2010]
fundamentals of parallel computer architecture. solihin books. 2016: 390. ISBN 9780984163007. Havender, James W. Avoiding deadlock in multitasking systems. IBM Systems