@article{10_1017_S001708950700345X,
     author = {BOURHIM, A. and MILLER, V. G.},
     title = {THE {SINGLE-VALUED} {EXTENSION} {PROPERTY} {IS} {NOT} {PRESERVED} {UNDER} {SUMS} {AND} {PRODUCTS} {OF} {COMMUTING} {OPERATORS}},
     journal = {Glasgow mathematical journal},
     pages = {99--104},
     year = {2007},
     volume = {49},
     number = {1},
     doi = {10.1017/S001708950700345X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950700345X/}
}