1. On the dosage accuracy of pellets using a high speed hard gelatin capsule filling and sealing machine;Marquardt;Drugs Made in Germany,1970
2. Investigations of the frequency and causes of dosage errors during the filling of hard gelatin capsules. 2nd communication: dosage errors during the filling of pellets into hard gelatin capsules;Pfeifer;Drugs Made in Germany,1986
3. Eine vergleichende Studie über Methoden zur quantitativen Bestimmung von Abrundung und Form an Sandkörnern;Schneiderhöhn;Heidelb. Beitr. Mineral. Petrograph.,1954
4. The evaluation of a three-dimensional shape factor for the quantitative assessment of the sphericity and surface roughness of pellets;Podczeck;Int. J. Pharm.,1995
5. The mechanical operations of filling hard capsules;Cole,1987