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Tarunpreet Singh Virk; Niranjan V. Ilawe; Guoxian Zhang; Craig P. Yu; Bryan M. Wong; Julian M. W. Chan. Sultam-Based Hetero[5]helicene: Synthesis, Structure, and Crystallization-Induced Emission Enhancement. ACS Omega. 2016, s. 1336–1342. doi:10.1021/acsomega.6b00335. PMID31457199.