2022
https://te.legra.ph/Koncepciya-umnogo-ukazatelya-static-ptrT-v-C-05-25
2021
https://proglib.io/p/umnye-ukazateli-v-c-2021-08-26
https://www.cppstories.com/2021/smart-ptr-ref-card/
https://www.cppstories.com/2013/02/smart-pointers-gotchas/
2020
https://www.nextptr.com/tutorial/ta1358374985/shared_ptr-basics-and-internals-with-examples
2015
https://www.justsoftwaresolutions.co.uk/cplusplus/shared-ptr-secret-constructor.html
    https://habr.com/ru/post/263751/