2019
https://medium.com/@bards95/comparative-evaluation-of-selected-constructs-in-java-and-kotlin-part-1-dynamic-metrics-2592820ce80
https://www.jworks.io/migrating-from-lombok-to-kotlin/
https://www.kotlindevelopment.com/tips-for-writing-a-library-in-kotlin/
2018
https://www.infoq.com/articles/intro-kotlin-java-developers
2017
https://habrahabr.ru/post/331280/
https://habrahabr.ru/post/337002/
https://spring.io/blog/2017/01/04/introducing-kotlin-support-in-spring-framework-5-0
http://frozenfractal.com/blog/2017/2/10/10-cool-things-about-kotlin/
https://habrahabr.ru/company/mailru/blog/329294/

https://medium.com/@BladeCoder/exploring-kotlins-hidden-costs-part-1-fbb9935d9b62
https://medium.com/@BladeCoder/exploring-kotlins-hidden-costs-part-2-324a4a50b70
https://medium.com/@BladeCoder/exploring-kotlins-hidden-costs-part-3-3bf6e0dbf0a4

https://hackernoon.com/5-small-things-you-probably-dont-know-about-kotlin-255261940de6
https://hackernoon.com/kotlin-a-deeper-look-8569d4da36f

https://medium.com/@piotr.slesarew/dsl-builder-in-kotlin-be5816ba3ca7

2016:
http://blog.scottlogic.com/2016/04/04/practical-kotlin.html