https://www.tensorflow.org/guide/keras/overview
    https://habr.com/ru/post/482126/
https://www.tensorflow.org/guide/keras/functional
    https://habr.com/ru/post/483664/

2017
https://habrahabr.ru/company/ods/blog/325432/

cheatsheet
https://s3.amazonaws.com/assets.datacamp.com/blog_assets/Keras_Cheat_Sheet_Python.pdf

books
2018
Gulli - Deep Learning with Keras