Bibliography (6):

1. https://github.com/microsoft/unilm/tree/master/e5

2. https://huggingface.co/intfloat/e5-large-v2

3. Contrastive Representation Learning: A Framework and Review

4. BEIR: A Heterogenous Benchmark for Zero-shot Evaluation of Information Retrieval Models

5. MTEB: Massive Text Embedding Benchmark

6. Wikipedia Bibliography:

   1. https://en.wikipedia.org/wiki/Okapi_BM25  :

      https://en.wikipedia.org/wiki/Okapi_BM25