@book {27758, title = {Das Theodor-Billroth-Geburtshaus in Bergen auf R{\"u}gen. Ursprung {\textendash} Lebensweg {\textendash} Gedenkst{\"a}tte}, year = {2010}, address = {G{\"o}ttingen}, author = {Hans-J{\"u}rgen Peiper and Wilhelm Hartel} }