Retraction Note: An architecture of agent-based multi-layer interactive e-learning and e-testing platform (Quality & Quantity, (2015), 49, 6, (2435-2458), 10.1007/s11135-014-0121-9)

Arif, M., Illahi, M., Karim, A., Shamshirband, S., Alam, K. A., Farid, S., … Balas, V. E. (2020, February 1). Retraction Note: An architecture of agent-based multi-layer interactive e-learning and e-testing platform (Quality & Quantity, (2015), 49, 6, (2435-2458), 10.1007/s11135-014-0121-9). Quality and Quantity. Springer. https://doi.org/10.1007/s11135-019-00948-9