@article{10_4064_aa_74_4_365_385,
     author = {K. Gy\H{o}ry and A. S\'ark\"ozy and C. Stewart},
     title = {On the number of prime factors of integers of the form ab + 1},
     journal = {Acta Arithmetica},
     pages = {365--385},
     publisher = {mathdoc},
     volume = {74},
     number = {4},
     year = {1996},
     doi = {10.4064/aa-74-4-365-385},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-74-4-365-385/}
}