Not sure if these count, but there are overt references to Firefly and Battlestar Galactica in Historicals Reunification War and Liberation of Terra, Vol. 1
The Drost IIA DropShip looks similar to the Serenity and its H:RW entry quotes a bit of dialogue from the series - "She'll be with you for the rest of your life" "That's because it's a deathtrap". There may be references to the Browncoat-Alliance War in that book, but none come to mind.
The TAS Dreadnought is an aging veteran warship converted to a musuem, then unexpectedly pressed back into service and escorting a civilian fleet following a devastating surprise attack. IIRC Dreadnaught's last CO is a reference to the Miami Vice character played by Edward James Olmos, who also plays Galactica's Commander Adama.
There was also a bit of Star Wars dialogue in one of the Jihad sourcebooks, an aerospace pilot getting mauled by the Snow Ravens yelling something about "lost Tyree, lost Clutch".