2 Commits

Author	SHA1	Message	Date
Andrzej Krzemienski	e7cab0e233	fixed digraphs in optional refs	2015-10-05 23:50:11 +02:00
Andrzej Krzemienski	cf4b2e8b16	specialization for optional ref - preliminary	2015-10-05 16:54:05 +02:00