@article{hassa15,
author = {Hassaballah, M. and Aly, Saleh},
title = {Face recognition: challenges, achievements and future directions},
journal = {IET Computer Vision},
volume = {9},
number = {4},
pages = {614-626},
keywords = {face recognition, face recognition systems, unconstrained conditions, real-world scenarios},
doi = {https://doi.org/10.1049/iet-cvi.2014.0084},
url = {https://ietresearch.onlinelibrary.wiley.com/doi/abs/10.1049/iet-cvi.2014.0084},
eprint = {https://ietresearch.onlinelibrary.wiley.com/doi/pdf/10.1049/iet-cvi.2014.0084},
year = {2015}
}

@misc{wikiFR23,
    author = "{Wikipedia contributors}",
    title = "Facial recognition system --- {Wikipedia}{,} The Free Encyclopedia",
    year = "2023",
    url = "https://en.wikipedia.org/w/index.php?title=Facial_recognition_system&oldid=1187927222",
    note = "[Online; accessed 12-December-2023]"
}