2025
https://projectreactor.io/docs/core/release/reference/reactiveProgramming.html
    https://habr.com/ru/articles/877332/
2022
https://habr.com/ru/post/694850/
2021
https://levelup.gitconnected.com/understanding-reactive-java-e8aaee9a204b
    https://nuancesprog.ru/p/13402/
https://habr.com/ru/post/537716/
2019
https://spring.io/blog/2019/12/13/flight-of-the-flux-3-hopping-threads-and-schedulers
2018
https://javatechnicalwealth.com/blog/reactive-flatmap/
Java and Project Reactor
    https://habr.com/company/funcorp/blog/350996/
    https://habr.com/company/funcorp/blog/359194/
https://www.infoq.com/articles/Designing-Implementing-Using-Reactive-APIs
https://www.infoq.com/articles/reactor-by-example
https://github.com/simonbasle/reactor-by-example
https://ebaytech.berlin/declarative-concurrency-with-reactor-70507e04054a
2016
https://spring.io/blog/2016/02/09/reactive-spring
https://spring.io/blog/2016/03/11/reactor-core-3-0-becomes-a-unified-reactive-foundation-on-java-8
https://spring.io/blog/2016/04/19/understanding-reactive-types