@article{10_1017_S0017089500000525,
     author = {Djokovi\'c, D. \v{Z}.},
     title = {Simple proof of a theorem on permanents},
     journal = {Glasgow mathematical journal},
     pages = {52--54},
     year = {1969},
     volume = {10},
     number = {1},
     doi = {10.1017/S0017089500000525},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000525/}
}