Fries, Colin (July 18, 2006). "Chronology of Wakeup calls"(PDF). NASA. p. 57. Archived(PDF) from the original on June 20, 2010. Retrieved December 16, 2006.
Fries, Colin (July 18, 2006). "Chronology of Wakeup calls"(PDF). NASA. p. 57. Archived(PDF) from the original on June 20, 2010. Retrieved December 16, 2006.