@article{10_21136_AM_1993_104557,
     author = {Douglas, Jim and Hensley, Jeffrey L. and Roberts, Jean E.},
     title = {An alternating-direction iteration method for {Helmholtz} problems},
     journal = {Applications of Mathematics},
     pages = {289--300},
     publisher = {mathdoc},
     volume = {38},
     number = {4-5},
     year = {1993},
     doi = {10.21136/AM.1993.104557},
     mrnumber = {1228510},
     zbl = {0807.65106},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1993.104557/}
}