@inproceedings{Shakura:20202L, author = "Shakura, N. I.", title = "{Concluding Remarks}", doi = "10.22323/1.342.0064", booktitle = "Proceedings of Accretion Processes in Cosmic Sources – II {\textemdash} PoS(APCS2018)", year = 2020, volume = "342", pages = "064" }