@patent {28131,
	title = {Method for applying powder to a printed sheet and printing press for carrying out the method},
	volume = {8757061},
	year = {2014},
	edition = {United States of America},
	chapter = {US},
	url = {https://patents.google.com/patent/US8757061B2/en},
	author = {Reiner Goetz and Claudius Haas and Reiner Haas and Marius Stelter}
}