Bregje D Onwuteaka-Philipsen, Aǵnes van der Heide, Dirk Koper, Inǵeborg Keij-Deerenberg, Judith AC Rietjens, Mette L Rurup, Astrid M Vrakking, Jean Jacques Georges, Martien T Muller, Gerrit van der Wal, Paul J van der Maas,
Euthanasia and other end-of-life decisions in the Netherlands in 1990, 1995, and 2001 The Lancet. ,vol. 362, pp. 395- 399 ,(2003) ,
10.1016/S0140-6736(03)14029-9