Quadruply charmed dibaryons as heavy quark symmetry partners of the DDK bound stateTian-Wei Wu, Ming-Zhu Liu, Li-Sheng Geng, Emiko Hiyama, Manuel Pavon Valderrama and Wen-Ling WangEur. Phys. J. C, 80 9 (2020) 901DOI: https://doi.org/10.1140/epjc/s10052-020-08483-w