Add help for the IACR eprint fetcher

Closes #176

en/IACRtoBibTex.md

@@ -0,0 +1,22 @@
+---
+title: Creating entries using IACR eprint IDs
+helpCategories: ["Fetching entries from the web", "... using publication identifiers"]
+since: 4.1
+---
+
+# Creating entries using IACR eprint IDs
+
+The [International Association for Cryptologic Research](https://www.iacr.org/) maintains an eprint archive to which anyone can submit papers and technical reports.
+These eprints are given IDs based on the year of submission, e.g. the 10th submission in 2018 gets the ID "2018/10".
+
+To create a new entry form an IACR eprint ID, choose **BibTeX → New entry...**.
+In the lower part, there is the box "ID-based entry generator".
+In the field "ID type", "IACR" should be already selected.
+The field "ID" is focused.
+Enter the eprints' ID here and press <kbd>Enter</kbd> to generate an entry based on the Id.
+You can also click on "Generate".
+The new entry is opened in an entry editor.
+In case an error occurs, a popup is shown.
+
+To get the ID, you may want to use their web search form at [https://eprint.iacr.org/search.html](https://eprint.iacr.org/search.html).
+