@article{700150,
     title = {Some solved and unsolved canonical problems of diffraction theory},
     booktitle = {Equadiff 6},
     series = {GDML\_Books},
     publisher = {J. E. Purkyn\v e University, Department of Mathematics},
     address = {Brno},
     year = {1986},
     pages = {[393]-398},
     mrnumber = {MR0877154},
     zbl = {0611.35069},
     url = {http://dml.mathdoc.fr/item/700150}
}

Meister, E. Some solved and unsolved canonical problems of diffraction theory, dans Equadiff 6, GDML_Books,  (1986), pp. [393]-398. http://gdmltest.u-ga.fr/item/700150/