@libora, do you know how to update pull requests? I have two requests:

- the style's default-locale should be "en-US" (for US English) or "en-GB" (for British English). "en-EN" is not a valid code.
- could you replace

```
<issnl>1805-2363</issnl>
<issn>1210-2709</issn>
```

with

```
<issn>1210-2709</issn>
<eissn>1805-2363</issn>
```

?