1(Zhou et al., 2011), 2(Durand, 1989), 3(Shoenfeld et al., 2014), 4(Burke et al., 1971), 5(Burke and Tsairis, 1973), 6(Enoka, 1995), 7(Guéritaud et al., 1985), 8(Robinson, 1970), 9(Fuchs et al., 1988), 10(Torres-Torrelo et al., 2012), 11(Nimchinsky et al., 2000), 12(Hedlund et al., 2010), 13(Valdez et al., 2012), 14(Comley et al., 2016), 15(Hashizume et al., 1988), 16(Swash and Fox, 1972).