[huffer1] Michael Huffer, The GLT Electronics Module (GEM): Programming ICD Specification, LAT-TD-01545.
[huffer2] Michael Huffer, The Tower Electronics Module (TEM): A Primer, LAT-DS-00605-D1.
[acd_icd] ACD GSFC, ACD-AEM Interface Control Document, LAT-SS-00363-D9.
[sapozhnikov1] Leonid Sapozhnikov, LAT VME Front-End Communications (Com) Board, LAT-DS-00226-D1.