 BibTeX entry and citation info  ``` @article{sniafas2021,   title={DoF: An image dataset for depth of field classification},   author={Niafas, Stavros},   doi= {10.13140/RG.2.2.17217.89443},   url= {https://www.researchgate.net/publication/355917312_Photography_Style_Analysis_using_Machine_Learning}   year={2021} } ```