When writing, I like to introduce an abbreviation for the whole citation. On the first instance, I would write "This is true as shown in (nbren12, et. al. 2012) (hereafter NB12)". In the subsequent usages, I would just say "This fact is true (NB12)". How can I implement this automatically using bibtex (or biblatex)?
This is similar but not identical to this question.