Architecture

https://medium.com/androiddevelopers/google-i-o-2018-app-architecture-and-testing-f546e37fc7eb https://proandroiddev.com/mvvm-architecture-viewmodel-and-livedata-part-1-604f50cda1 https://proandroiddev.com/mvvm-architecture-viewmodel-and-livedata-part-2-di-1a6b1f96d84b https://proandroiddev.com/mvvm-architecture-viewmodel-and-livedata-part-3-androidx-upgrade-980c4fdbf9d6 https://proandroiddev.com/android-clean-architecture-with-viewmodel-usecases-and-repositories-part-1-b9e63889a1aa

Kotlin

https://www.kotlindevelopment.com/typical-kotlin
https://proandroiddev.com/kotlin-android-extensions-the-definitive-guide-786d190b30e7 https://jeroenmols.com/blog/2018/11/01/kotlinstackoverflow/

Coroutines

https://kotlinexpertise.com/kotlin-coroutines-guide
https://proandroiddev.com/coroutines-snags-6bf6fb53a3d1
https://proandroiddev.com/part-2-coroutine-cancellation-and-structured-concurrency-2dbc6583c07d
https://medium.com/@mayojava/async-operations-with-kotlin-coroutines-part-1-c51cc581ad33
https://www.youtube.com/watch?feature=youtu.be&v=P7ov_r1JZ1g
https://android.jlelse.eu/a-first-walk-into-kotlin-coroutines-on-android-fe4a6e25f46a .