TY - GEN A1 - Hartmann, Jürgen A1 - Fischer, J. A1 - Seidel, J. T1 - Improved accuracy in measurement of radiometric apertures with a non-contact technique BT - Newrad’99 (Poster) Y1 - 1999 CY - Madrid (Spanien) ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Engert, J. A1 - Fellmuth, B. A1 - Fischer, Joachim A1 - Hollandt, Jörg A1 - Tegeler, E. A1 - Seidel, J. T1 - Die internationale Temperaturskalen BT - ITS-90 und PLTS-2000 JF - PTB Mitteilungen Y1 - 2007 UR - http://permalink.bibkatalog.de/BV035078972 VL - 117 IS - 3 SP - 236 EP - 242 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Fischer, J. A1 - Seidel, J. T1 - A non-contact technique providing improved accuracy in area measurements of radiometric apertures JF - Metrologia Y1 - 2000 UR - http://permalink.bibkatalog.de/BV012573233 IS - 37 SP - 637 EP - 640 ER -