Active Collimator for the BGO Anti-Compton Shield of the HPGe Clover Detector oleh Das Biswajit, Khan Chowdhury N.R., Saha S., Laskar Md.R.S., Babra F.S., Malik V., Kundu A., Dey P., Jadav S.K., Naidu B.S., Vazhappilly A.T., Sihotra S., Palit R.