%0 Journal Article %A Balog, Antal %T Six Primes and an Almost Prime in Four Linear Equations %J Canadian journal of mathematics %D 1998 %P 465-486 %V 50 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1998-025-1/ %R 10.4153/CJM-1998-025-1 %F 10_4153_CJM_1998_025_1