I'm using apalike-letters bibliography style which inserts heading for each first letter of authors' names. It works well for English letters but when a name starts with Polish letter it starts to get crazy. Consider following example:
Note that the order of the items is correct (Ł should be after L and Ś should be after S) but first letters of Łuszczewski and Śpiewak are replaced with their second letters.
I think that it is caused by
purify function which strips non-alphanumeric characters from string (and Ł and Ś are not treated as alphanumeric) but I don't know how to change this. All I managed to do is to change Ł to
\L but then Łuszczewski was inserted in L section which is not correct.
Any ideas how to change this?
You can find the whole project (with the style file in it) at http://piec.info/apalike-letters_test2.zip [76 KB].