@article{NSJOM_1990_20_1a_3,
     author = {Miguel A. Hern\'andez Ver\'on},
     title = {An acceleration procedure 

 of the whittaker method by means of convexity},
     journal = {Novi Sad Journal of Mathematics},
     pages = {27-38},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1990_20_1a_3/}
}