Yamashita R, Hideshige Takada H, Nakazawa A, Takahashi A, Ito M, Yamamoto T, Watanabe YY, Kokubun N, Sato K, Wanless S, Daunt F, Hyrenbach D, Hester M, Deguchi T, Nishizawa B, Shoji A, Watanuki Y (2018) Global monitoring of persistent organic pollutants (POPs) using seabird preen gland oil. Arch Environ Contam Toxicol 75:545-556 https://doi.org/10.1007/s00244-018-0557-3