Paper  bibtex   

@book{stice_cloning_2004,
	title = {Cloning pigs using donor nuclei from differentiated cells},
	url = {https://patents.google.com/patent/US7291764B1/en},
	publisher = {US Patent App. 10/817,573},
	author = {Stice, Steven and Robl, James and Cibelli, Jose and Golueke, Paul},
	year = {2004},
}