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- [5] 20th International Conference on HCI, HCI International 2018 Communications in Computer and Information Science, 2018, 852
- [7] 20th International Polysaccharides-Glycoscience Conference LISTY CUKROVARNICKE A REPARSKE, 2025, 141 (01):
- [8] Highlights from the 20th International AIDS Conference LANCET INFECTIOUS DISEASES, 2014, 14 (09): : 800 - 801
- [9] 20th Anniversary International Scientific and Technical Conference Photogrammetric Record, 2021, 36 (174): : 181
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