@article{MOMA_1997__124_4_178779,
     author = {S. Bulman-Fleming and John Fountain},
     title = {Products of {Idempotent} {Endomorphisms} of {Free} {Acts} of {Infinite} {Rank.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {1--16},
     publisher = {mathdoc},
     volume = {124},
     number = {4},
     year = {1997},
     zbl = {0888.20041},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1997__124_4_178779/}
}