Ertl-Wagner BB, Stäbler A, Brossmann J, Trudell D, Resnick D.
Assessment of the position of the distal portion of the ulna in lateral projection radiographs of the wrist: analysis of the influence of pronation-supination and flexion-extension on the pisoscaphoid and the ulnotriquetral distances: a cadaver study
Invest Radiol 2001; 36:612-618