@article{lambe:1934:sde,
    author = {Lambe, C. G. and Ward, D. R.},
     title = {Some differential equations and associated
              integral equations},
   journal = {Quart. J. Math. (Oxford)},
  fjournal = {Oxford Quarterly Journal of Mathematics},
    volume = {5},
      year = {1934},
     pages = {81–97},
       doi = {10.1093/qmath/os-5.1.81},
     zblno = {0009.16401}}