Xorxes' morphology rules:
http://www.lojban.org/tiki/tiki-index.php?page=BPFK+Section%3A+PEG+Morphology+Algorithm&bl
Robin's PEG grammar and morphology rules:
camxes
lojban_peg.txt
lojban_morphology.peg.txt
John Leuner's PEG grammar is a combination of Robin's peg grammar and Xorxes' morphology rules:
.alyn.post.'s PEG grammar is derived from camxes:
This grammar is used by jbogenturfa'i, a Lojban grammar parser written in Scheme.