“…, Sobek (1997), Pessôa (2006), McManus, Haggerty and Murman (2005), Ballé and Ballé (2005), Kennedy, Harmon and Minnock (2008), Kato (2005), Seth, Seth and Goel (2008), Collin, Eloranta and Holmström (2009), Hilletofth (2009), Jorgensen and Emmitt (2007, Parry, Mils and Turner (2010), Fung, Chen and Yip (2008), Taylor (2006), Pawar, Beltagui and Riedel (2009), Allee (2009), Enquist, Edvardsson and Sebhatu (2007 and Hilletofth and Eriksson (2011).…”