Exercice 3 - TP Zoo Trégomeur
https://framagit.org/gtaysse/slam1--exploitation-d-un-schema-de-donnees---2020/-/blob/master/S%C3%A9quence%204%20-%20Les%20cas%20particuliers%20du%20DDC/TP_-S%C3%A9quence_4-_Diag.Classes-_les_cas_particuliers.pdf
https://framagit.org/gtaysse/slam1--exploitation-d-un-schema-de-donnees---2020/-/blob/master/S%C3%A9quence%204%20-%20Les%20cas%20particuliers%20du%20DDC/TP_-S%C3%A9quence_4-_Diag.Classes-_les_cas_particuliers.pdf