2019
https://matthisk.com/first-class-failure-scenarios-in-java/
https://www.baeldung.com/vavr-collections
    https://habr.com/ru/post/474402/
2018
https://blog.pragmatists.com/functional-programming-in-java-with-vavr-9861e704301c
    https://habr.com/post/421839/