Added reference to use for citing this model
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/4556?src=pr&el=h1) Report
> Merging [#4556](https://codecov.io/gh/huggingface/transformers/pull/4556?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/a34a9896ac2a4a33ff9cd805c76eed914c8d8965&el=desc) will **increase** coverage by `0.05%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/4556/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/4556?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #4556      +/-   ##
==========================================
+ Coverage   77.87%   77.93%   +0.05%     
==========================================
  Files         123      123              
  Lines       20566    20566              
==========================================
+ Hits        16016    16028      +12     
+ Misses       4550     4538      -12     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/4556?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/modeling\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/4556/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl91dGlscy5weQ==) | `87.84% <0.00%> (-0.83%)` | :arrow_down: |
| [src/transformers/data/processors/squad.py](https://codecov.io/gh/huggingface/transformers/pull/4556/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9kYXRhL3Byb2Nlc3NvcnMvc3F1YWQucHk=) | `34.07% <0.00%> (+5.41%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/4556?src=pr&el=continue).
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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/4556?src=pr&el=footer). Last update [a34a989...433d479](https://codecov.io/gh/huggingface/transformers/pull/4556?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
