added paper reference

README.md

@@ -59,4 +59,23 @@ The corpus includes parallel data for Livonian-Latvian, Livonian-Estonian and Li
 * Songs - material crawled off lyricstranslate.com;
   * liv-en: 54, 
   * liv-lv: 54, 
-  * liv-fr: 31
+  * liv-fr: 31
+
+Please, cite the following paper if you use this dataset:
+```
+@inproceedings{rikters-etal-2022-machine,
+    title = "Machine Translation for {L}ivonian: Catering to 20 Speakers",
+    author = "Rikters, Mat{\=\i}ss  and
+      Tomingas, Marili  and
+      Tuisk, Tuuli  and
+      Ern{\v{s}}treits, Valts  and
+      Fishel, Mark",
+    booktitle = "Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)",
+    year = "2022",
+    address = "Dublin, Ireland",
+    publisher = "Association for Computational Linguistics",
+    url = "https://aclanthology.org/2022.acl-short.55",
+    doi = "10.18653/v1/2022.acl-short.55",
+    pages = "508--514",
+}
+```