@misc{Gray2010,
author = {Gray, B.J. and Lumley, T.},
title= {ConvCalendar: converts dates between calendars},
year = {2010},
URL = {http://cran.r-project.org/web/packages/ConvCalendar/index.html },
note = {(Accessed January 16, 2013)},
edition = {1.1},
}