The summarizer is described in detail in the paper that can be downloaded here.

```
@article{sidenet-2017,
author={Shashi Narayan and Nikos Papasarantopoulos and Mirella Lapata and Shay B. Cohen},
title={Neural Extractive Summarization with Side Information},
journal={CoRR},
volume={abs/1704.04530},
year={2017},
ee={http://arxiv.org/abs/1704.04530},
}
```