@article{SMJ2_2014_40_3-4_a2,
     author = {Al Alam, Ihab and Lef\`evre, Pascal},
     title = {Essential {Norms} of {Weighted} {Composition} {Operators} on {L^1} {M\"untz} {Spaces}},
     journal = {Serdica Mathematical Journal},
     pages = {241--260},
     publisher = {mathdoc},
     volume = {40},
     number = {3-4},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2014_40_3-4_a2/}
}