Ghose, A K., Horkoff, J., Souza, V E S., Parsons, J., Evermann, J., & Parsons, J o i s. [2021]. Conceptual modeling: 40th International Conference, ER 2021, virtual event, October 18-21, 2021, proceedings. Cham, Switzerland: Springer.

Conceptual modeling : 40th International Conference, ER 2021, virtual event, October 18-21, 2021, proceedings / Aditya Ghose, Jennifer Horkoff, Vítor E. Silva Souza, Jeffrey Parsons, Joerg Evermann (eds.) . — Cham, Switzerland : Springer, [2021]. — xvi, 424 pages; illustrations (black and white); 24 cm. — (13011). — ISBN 9783030890216

Ghose, Aditya K., et al. Conceptual Modeling: 40th International Conference, ER 2021, Virtual Event, October 18-21, 2021, Proceedings.Cham, Switzerland: Springer, [2021].