@article{ARM_2005_41_2_a0,
     author = {Khan, Rahmat A. and Ahmad, Bashir},
     title = {A note on rapid convergence of approximate solutions for second order periodic boundary value problems},
     journal = {Archivum mathematicum},
     pages = {135--143},
     year = {2005},
     volume = {41},
     number = {2},
     mrnumber = {2164662},
     zbl = {1117.34018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2005_41_2_a0/}
}