Co-circulation of genetically distinct highly pathogenic avian influenza A clade 2.3.4.4 (H5N6) viruses in wild waterfowl and poultry in Europe and East Asia, 2017?18, Poen, Marjolein J., Venkatesh Divya, Bestebroer Theo M., Vuong Oanh, Scheuer Rachel D., Oude Munnink Bas B., de Meulder Dennis, Richard Mathilde, Kuiken Thijs, Koopmans Marion P. G., et al. , Virus Evolution, Oct-04-2020, Volume 5, Issue 1, (2019)