* {{Cite book| publisher = Oxbow | isbn = 978-1-84217-987-1 | pages = 1–37 | editorseditor = John Steele (ed.) | last = Smith | first = Adam | title = Calendars and years II : astronomy and time in the ancient and medieval world | chapter = The Chinese sexagenary cycle and the ritual origins of the calendar | location = Oxford | year = 2011|url=http://cangjie.info/public/papers/SmithAdam_2010_sexagenary.pdf }}
| last = Smith | first = Adam | title = Calendars and years II : astronomy and time in the ancient and medieval world
| chapter = The Chinese sexagenary cycle and the ritual origins of the calendar | location = Oxford | year = 2011|url=http://cangjie.info/public/papers/SmithAdam_2010_sexagenary.pdf }}
