Welfare issues and potential solutions for laying hens in free range and organic production systems: A review based on literature and interviews oleh Claire Bonnefous, Anne Collin, Laurence A. Guilloteau, Vanessa Guesdon, Christine Filliat, Sophie Réhault-Godbert, T. Bas Rodenburg, Frank A. M. Tuyttens, Frank A. M. Tuyttens, Laura Warin, Sanna Steenfeldt, Lisa Baldinger, Martina Re, Raffaella Ponzio, Anna Zuliani, Pietro Venezia, Minna Väre, Patricia Parrott, Keith Walley, Jarkko K. Niemi, Christine Leterrier