Authors: Wolfgang Boettcher; Frank Merkle; Michael Huebler; Andreas Koster; Fritz Schulz; Michael Kopitz; Hermann Kuppe; Peter Lange; Roland Hetzer Journal: J Extra Corpor Technol Date: 2005-09
Authors: F N McKenzie; R O Heimbecker; K T Barnicoat; A Robert; N F Gergeley; R Del Maestro; W Wall Journal: Can Med Assoc J Date: 1975-05-03 Impact factor: 8.262