added citations

README.md

@@ -89,4 +89,8 @@ SentenceTransformer(
 
 ## Citing & Authors
 
-<!--- Describe where people can find more information -->
+- Ham, J., Choe, Y. J., Park, K., Choi, I., & Soh, H. (2020). Kornli and korsts: New benchmark datasets for korean natural language understanding. arXiv
+preprint arXiv:2004.03289
+- Reimers, Nils and Iryna Gurevych. “Sentence-BERT: Sentence Embeddings using Siamese BERT-Networks.” ArXiv abs/1908.10084 (2019)
+- [Ko-Sentence-BERT-SKTBERT](https://github.com/BM-K/KoSentenceBERT-SKT)
+- [KoBERT](https://github.com/SKTBrain/KoBERT)