@article{ITA_1991__25_2_147_0,
     author = {Vogler, Walter},
     title = {A generalization of traces},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {147--156},
     year = {1991},
     publisher = {EDP Sciences},
     volume = {25},
     number = {2},
     mrnumber = {1110981},
     zbl = {0731.68083},
     language = {en},
     url = {https://www.numdam.org/item/ITA_1991__25_2_147_0/}
}