@article{10_4153_CMB_1989_056_0,
     author = {Guillory, Carroll},
     title = {A {Characterization} of a {Sparse} {Blaschke} {Product}},
     journal = {Canadian mathematical bulletin},
     pages = {385--390},
     year = {1989},
     volume = {32},
     number = {4},
     doi = {10.4153/CMB-1989-056-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-056-0/}
}