1. Computerized tomography of the retroperiloneal space;Stephens;Radiol Clin North Am,1977
2. Echographic diagnosis of lesions of the abdominal aorta and lymph nodes;Freimanis;Radiol Clin North Am,1975
3. Roentgenological diagnosis: generalized subserous emphysema through a single puncture;Ruiz Riuas;Am J Roentgenol,1950
4. Extraperiloneal pneumography in diagnosis of retroperitoneal tumors;Steinbach;Arch Sutg,1955
5. Retropneumoperiloneal visualization of abdominal organs in domestic animals;Ześkov;J Am Vet Rad Soc,1976