A New Helical Crossed-Fibre Structure of β-Keratin in Flight Feathers and Its Biomechanical Implications Lingham-Soliar, Theagarten ; Murugan, Nelisha Abstract Publication: PLoS ONE Pub Date: June 2013 DOI: 10.1371/journal.pone.0065849 Bibcode: 2013PLoSO...865849L