@conference{786946, author = {W Lee and Jon Shirley and F Walls and Robert Drullinger}, title = {Systematic Errors in Cesium Beam Frequency Standards Introduced by Digital Control of the Microwave Excitation}, year = {1995}, month = {1995-01-01 00:01:00}, publisher = {9^uth^European Freq. and Time Forum , Besan{c-cedilla}on, 1, FR}, language = {en}, }