@article{LeprattiBergerArnold, author = {Lepratti, Raffaello and Berger, Ulrich and Arnold, Klaus-Peter}, title = {Die Nat{\"u}rliche Sprache zur Mensch-Maschine-Interaktion}, language = {de} } @incollection{BergerKretzschmannArnold, author = {Berger, Ulrich and Kretzschmann, Ralf and Arnold, Klaus-Peter}, title = {Heuristic STEP-NC Based Process Planning Tool for Sequencing NC Machining Operations}, series = {Advanced Design and Manufacturing Based on STEP}, booktitle = {Advanced Design and Manufacturing Based on STEP}, editor = {Xun, Xu and Nee, Andrew Y. C.}, publisher = {Springer}, address = {London}, isbn = {978-1-8488-2738-7}, pages = {49 -- 78}, language = {en} } @article{BergerKretzschmannArnoldetal., author = {Berger, Ulrich and Kretzschmann, Ralf and Arnold, Klaus-Peter and Minhas, Sarfraz Ul-Haque}, title = {Approach for the Development o a heuristic Process Planning Tool for Sequencing NC Machining Operations}, language = {en} }