What is et alei?

"et al." or "et. al." is an abbreviation of the Latin phrase "et alii" meaning "and others," often used in academic writing when referring to a group of people or authors. It is commonly used in citations to indicate additional authors who have contributed to a particular work. The abbreviation is usually accompanied by a period and is used after the first author's name. For example, "Smith et al. (2018) found that..." indicates that Smith and others conducted the research presented in the publication in 2018.