english.stackexchange.com/questions/121054/which-one-is-correct-et-al-s-or-et-al

The grammatically correct way is "Einstein et al.'s paper", because to indicate possession by a noun phrase in English, the 's should be applied ...

english.stackexchange.com/questions/33304/et-cetera-vs-et-al

I would say there is a definite distinction between the two, in definition and in proper usage. Et cetera, often shortened to etc., means literally ...

www.e-education.psu.edu/styleforstudents/c3_p28.html

It is important to use these abbreviations literally and to punctuate them correctly. Many writers confuse "e.g." and "i.e.," and many type "et al." improperly or do ...

en.wiktionary.org/wiki/et_al.

From Latin, abbreviation of et (“and”) and alii (“others”) (English: et alii) and its ... However, in lists of authors of a published work, et al. is still regularly used.

blog.apastyle.org/apastyle/2011/02/et-al-when-and-how.html

Feb 4, 2011 ... Third on the list is the usage of et al. Given the level of detail in these style rules, it's no surprise that many find them challenging. Here are three ...