find non LaTeX characters (eg. acute accents) with regex in vim

I was pasting bibtex references into bibex. some names contain characters that latex skips. for example, á. is there a way in vim or regex to search for all characters that are skipped by latex? one way I would thin开发者_JAVA技巧k is to write in regex to search for anything that doesn't contain 0-9, a-z, A-Z and some characters like / \ $

I am not familiar with which characters LaTeX ignores, but if the file you are editing is encoded in UTF-8, you might try searching for characters outside the ASCII repertoire (0–127; or 32–127).

As a search command in Vim:

/[^\d0-\d127]

/[^\d32-\d127]

You can also use hex or octal instead of decimal; see :help /[]. This requires that l and \ not be present in the value of cpoptions (they are not present in the default state).

This should work for any encoding that is “the same as ASCII (where it is defined)” (i.e. UTF-8 and most “latin” encodings). If you are dealing with an encoding that clashes with ASCII, then you will need to refine the range specification.