@book { TheEffectsofConstructivismTheoryintheEnvironmentofElearning,
    title = "The Effects of Constructivism Theory in the Environment of E-learning",
    author = "Serafeim A. {Triantafyllou}",
    year = "2019",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/490817"
}