document.write('<b>Beutel, R.G. et Gorb, S.N.</b> 2001. Ultrastructure of attachement specializations of hexapods (Arthropoda): evolutionary patterns inferred from a revised ordinal phylogeny [Collembola included]., J. Zool. Syst. Evol. Research, 39, 2001, p.177-207. ');