Biomedical paper clustering 
https://amslaurea.unibo.it/29686/1/thesis_xia.pdf

Hierarchical topic detection of documents
https://www.sciencedirect.com/science/article/pii/S0004370217300735

LLM Multi level exploration of question
https://dl.acm.org/doi/abs/10.1145/3586183.3606756

Organizing large datasets into hierarchical topic taxonomies
https://link.springer.com/article/10.1007/s007780050061

Taxonomie construction methodes
http://www.ijcse.com/docs/INDJCSE11-02-05-006.pdf

Mapping the mind with free associations
file:///home/gratach/Downloads/associatoR_Manuscript_2024-04-07-1.pdf