@article{10_4064_aa140_3_2,
     author = {Norbert Hegyv\'ari and Fran\c{c}ois Hennecart},
     title = {Explicit constructions of extractors and expanders},
     journal = {Acta Arithmetica},
     pages = {233--249},
     publisher = {mathdoc},
     volume = {140},
     number = {3},
     year = {2009},
     doi = {10.4064/aa140-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa140-3-2/}
}