@article{shanker:1940:ept,
    author = {Shanker, Hari},
     title = {On the expansion of the product of two parabolic cylinder
              functions of non integral order},
   journal = {Proc. Benares Math. Soc. (N. S.)},
    volume = {2},
      year = {1940},
     pages = {61–68},
   mrclass = {33.0X},
  mrnumber = {MR0007075 (4,81h)},
mrreviewer = {M. C. Gray},
     zblno = {0063.06929}}