Khashan EA, El Desouky AI, Elghamrawy SM. A Framework for Executing Complex Querying for Relational and NoSQL Databases (CQNS). EJECE [Internet]. 2020 Sep. 22 [cited 2023 Jun. 2];4(5). Available from: https://www.ejece.org/index.php/ejece/article/view/195