Reference intervals for B-esterases in gull, Larus michahellis (Nauman, 1840) from Northwest Spain: influence of age, gender, and tissue - Salomé Martínez Morcillo; Maria Chiara Perego; Jorge Vizuete; Francesca Caloni; Cristina Cortinovis; Luis Eusebio Fidalgo; Ana López-Beceiro; María Prado Míguez; Francisco Soler; Marcos Pérez-López (Environmental Science and Pollution Research, 2018)