@TECHREPORT{kyburg:sipta:interval_prob:1999, AUTHOR = {Henry E. Kyburg}, TITLE = {Interval-valued probabilities}, INSTITUTION = {Society for Imprecise Probabilities: Theories and Applications}, YEAR = {1999}, PAGES = {11}, URL = {https://www.sipta.org/documentation/interval_prob/kyburgnew.pdf}, }