1. SBA Stone Forest.: Mitigating Risks Associated with Seals. Stone Forest Business Advisors. https://www.stoneforest.com.sg/business-advisors/Articles/Article/mitigating-risks-associated-with-seals. Accessed 1 Oct 2021
2. W. Gao, S. Dong, X. Chen, A system for automatic Chinese seal imprint verification, in Proceedings of 3rd International Conference on: Document Analysis and Recognition, Montreal, Quebec (vol. 2, 1995), pp. 660–664
3. B. Micenkov, J.V. Beusekom, Stamp detection in color document images. ICDAR 1125–1129 (2011)
4. Y. Bhalgat, M. Kulkarni, S. Karande, S. Lodha, Stamp processing with examplar features. arXiv:1609.05001 (2016)
5. P. Forczmanski, A. Markiewicz, Low-level image features for stamps detection and classification. CORES 2013, 383–392 (2013)