Radiographic Method with Minimal Radiation Dose

Embring G. Mattsson O. : Stabilized barium sulphate X-ray compositions. U.S. Patent No. 3216900, Washington Patent Office, November 9th 1965.

Embring G. Mattsson O. An improved physiologic contrast medium for the alimentary tract. Acta radiol. Diagnosis 4 (1966), 105.

Mattsson O. Lagerlöf H. Perman G. : Barium contrast medium with physiological properties. Some experiences. Abstr. 9th Intern. Congr. Radiology, Munich 1959, p. 145.