GPT
- Improving language understanding by generative pre-training - https://www.mikecaptain.com/resources/pdf/GPT-1.pdf - GPT-1, cited 15k, published in 2018 
- Language Models are Unsupervised Multitask Learners - Cited 18k, published in 2019 - It is GPT-2. Code: https://github.com/openai/gpt-2