Model-based methods are one of the more complicated topics that you will need to learn about, so if you wish to dig deeper into the concepts involved, you can read through the following papers:
- Neural Turing Machines: https://arxiv.org/pdf/1410.5401.pdf
- Memory-augmented neural networks: http://proceedings.mlr.press/v48/santoro16.pdf
- Meta networks: https://arxiv.org/pdf/1703.00837.pdf