https://www.cnblogs.com/zhouyc/p/16943042.html
https://zhuanlan.zhihu.com/p/250851222
https://zhuanlan.zhihu.com/p/683836377
Out of the Box Thinking: Improving Customer Lifetime Value Modelling via Expert https://www.zhihu.com/question/22028394
基于多任务学习的游戏用户生命周期价值（LTV）预估 https://zhuanlan.zhihu.com/p/348409645?utm_id=0
