@misc{HartmannFischerSeidel, author = {Hartmann, J{\"u}rgen and Fischer, J. and Seidel, J.}, title = {Improved accuracy in measurement of radiometric apertures with a non-contact technique}, address = {Madrid (Spanien)}, language = {en} } @article{HartmannEngertFellmuthetal., author = {Hartmann, J{\"u}rgen and Engert, J. and Fellmuth, B. and Fischer, Joachim and Hollandt, J{\"o}rg and Tegeler, E. and Seidel, J.}, title = {Die internationale Temperaturskalen}, series = {PTB Mitteilungen}, volume = {117}, journal = {PTB Mitteilungen}, number = {3}, pages = {236 -- 242}, language = {de} } @article{HartmannFischerSeidel, author = {Hartmann, J{\"u}rgen and Fischer, J. and Seidel, J.}, title = {A non-contact technique providing improved accuracy in area measurements of radiometric apertures}, series = {Metrologia}, journal = {Metrologia}, number = {37}, pages = {637 -- 640}, language = {en} }