Weiand, Augusto, Francieli Motter Ludovico, and Patrícia da Silva Campelo Costa Barcellos. 2019. “Virtual Learning Environments in the Light of Mind Maps and Flashcards: A Systematic Literature Review”. International Journal for Innovation Education and Research 7 (9): 104-13. https://doi.org/10.31686/ijier.vol7.iss9.1713.