The list below is not an exhaustive list but provides promising starting points.
All titles listed below would be considered "scholarly sources" and may directly support your assignments (to read and inform, cite and incorporate).
Beasts at Bedtime: revealing the environmental wisdom in children's literature [PRINT & ONLINE] by 
Nature and the Environment (on nature in literature) [PRINT] by 
Fairy Tales and Society: illusion, allusion, and paradigm [ONLINE] by 
Environmental Humanities in Folktales: Theory and Practice [ONLINE] by 
Myth and Environmentalism: Arts of resilience for a damaged planet [ONLINE] by 