@article{10_4064_aa_25_3_265_300,
     author = {Carl Pomerance},
     title = {Odd perfect numbers are divisible by at least seven distinct primes},
     journal = {Acta Arithmetica},
     pages = {265--300},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1973},
     doi = {10.4064/aa-25-3-265-300},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-25-3-265-300/}
}