@article{700275,
     title = {Seventy-five years of global analysis around the forced pendulum equation},
     booktitle = {Proceedings of Equadiff 9},
     series = {GDML\_Books},
     publisher = {Masaryk University},
     address = {Brno},
     year = {1998},
     pages = {115-145},
     url = {http://dml.mathdoc.fr/item/700275}
}

Mawhin, Jean. Seventy-five years of global analysis around the forced pendulum equation, dans Proceedings of Equadiff 9, GDML_Books,  (1998), pp. 115-145. http://gdmltest.u-ga.fr/item/700275/