Zippel، Claus؛ Bohnet-Joschko، Sabine (2017). "Post market surveillance in the german medical device sector - current state and future perspectives". Health Policy (Amsterdam, Netherlands). ج. 121 ع. 8: 880–886. DOI:10.1016/j.healthpol.2017.06.005. ISSN:1872-6054.
Zippel، Claus؛ Bohnet-Joschko، Sabine (2017). "Post market surveillance in the german medical device sector - current state and future perspectives". Health Policy (Amsterdam, Netherlands). ج. 121 ع. 8: 880–886. DOI:10.1016/j.healthpol.2017.06.005. ISSN:1872-6054.