@Misc{BVMC:260371, author = {Wensell, Ulises}, title = {Ilustraciones para "Bleib mein Freund, kleiner Bär!"}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2009}, year = {2009}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc6d697} }