2003, Alan R. Williams, The Knight and the Blast Furnace: A History of the Metallurgy of Armour in the Middle Ages & the Early Modern Period, BRILL, →ISBN, page 35:
The "lamellenhelme" type consisted of overlapping lamellae (perhaps from dismantled lamellar armours?) and the "crested helm" type consisted of a number of segments with a fore-and-aft plate.
2017, Ken Mondschein, Game of Thrones and the Medieval Art of War, McFarland (→ISBN)
Another style was the lamellenhelm, which had smaller pieces of metal, like lamellar, similarly riveted to a strapwork. Such helmets remained popular all the way through the eleventh century, […]
