@article{10_4153_CJM_1977_102_0,
     author = {Baxter, J. R. and Chacon, R. V.},
     title = {Enlargement of {\ensuremath{\sigma}-Algebras} and {Compactness} of {Time} {Changes}},
     journal = {Canadian journal of mathematics},
     pages = {1055--1065},
     year = {1977},
     volume = {29},
     number = {5},
     doi = {10.4153/CJM-1977-102-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-102-0/}
}