@ARTICLE{publication1, title = "How to centralize and normalize quandle extensions", author = "{DUCKERTS-ANTOINE. Mathieu} and {EVEN, Val{\'{e}}rian} and {MONTOLI, Andrea}", year = "2018", abstract = " ", journal = "Journal of Knot Theory and its Ramifications", volume = "27", number = "2", pages = "1-23" }