5 Tips for Building Multi-Language Alexa Skills : Alexa Blogs
GitHub - alexa-samples/skill-sample-java-fact: An Alexa Skill Sample to demonstrate how to write skills for Echo Show and Echo Spot in Java using the Alexa Skills Kit (ASK) SDK v2
Make your own Amazon Alexa Skill
How to Build Your First Amazon Alexa Skill, Pt. 2: Skill Interface - Zach DotyZach Doty