(Rubinstein et al., 2002)
(Billstein and Williamson, 2002)
(Billstein and Williamson, 2005)
(Larson et al., 2007)
(Larsen et. al., 2004)
(Larson et. al., 2005)
(Rubinstein et al., 2002)
(Billstein and Williamson, 2002)
(Billstein and Williamson, 2005)
(Larson et al., 2007)
(Larson et al., 2007)
(Larson et. al., 2004)
(Larson et. al., 2005)
(Brown, 2003)
(Larson et. al., 2004)
(Larson et al., 2007)
(Larson et. al., 2001)
(Larson et. al., 2004)
(Larson et al., 2007)
(Larson et. al., 2001)
(Larson et. al., 2004)
(Larson, 2007)
(Larson et al., 2007)
(Larson et al., 2003)
(Larson, 2005)