Develop Enterprise Applications with Apex
https://www.salesforce.com/plus/experience/Dreamforce_2021/series/Developer/episode/episode-3
Apex-Recipes
https://github.com/trailheadapps/apex-recipes
Trailhead: Apex-Recipes Quick Start
https://trailhead.salesforce.com/ja/content/learn/projects/quick-start-explore-the-apex-recipes-sample-app
EnterpriseReady.io
https://www.enterpriseready.io/
PofEAAパターン集(日本語)
https://bliki-ja.github.io/pofeaa/
Trailhead: Apexエンタープライズパターン
https://trailhead.salesforce.com/ja/content/learn/modules/apex_patterns_dsl