@book{10127,
	author = {Gamma, Erich},
	title = {Design Patterns Elements of reusable object-oriented software},
	publisher = {Dorling Kindersley, Pearson},
	year = {2013},
	address = {India},
	edition = {19th},
	url = {https://libgen.is/book/index.php?md5=3D9AB055C04797340D8C97BBB6E89D60}
}