I have some literature written by Chinese authors who I would like to attribute in my bibliography with their names in Chinese characters (汉字). The problem is that, as the literature itself is not in Chinese, their names appear only in their romanized form (Pīnyīn or Wade–Giles).

What resources can I use to find out the correct characters for their names, e. g. library catalogues with both forms given, author lists, etc.?

I am not only looking for Chinese names but Japanese ones as well.