SHA A, HAO H. Expressions and Distributions of Leucine-enkephalin, Delta, Mu, and Kappa Opioid Receptors in Four Systems of the Octopus, Octopus ocellatus by Comparative Immunohistochemical Method and ELISA. J Hellenic Vet Med Soc [Internet]. 2022 Jan. 28 [cited 2024 Dec. 19];72(4):3337-44. Available from: https://ejournals.epublishing.ekt.gr/index.php/jhvms/article/view/29371