@Article{ Zyka-TUGboat99,
  IS =     { zkontrolovano 02 Jan 01 },
  author =   {V{\'\i}t Z{\'y}ka},
  title =   {The semaphore alphabet},
  year =   {1999},
  month =   dec,
  pages =   {348-350},
  journal =   {TUGboat, The Communication of the TeX Users Group},
  publisher =   {TeX Users Group},
  address =   {1466 NW Naito Parkway, Portland, U.S.A.},
  issn =   {0896-3207},
  volume =   {20},
  number =   {4},
  authorship =   {100},
  www =          {ftp://cmp.felk.cvut.cz/~zyka/pub/cmp/users/zyka/semafor},
  project =   { VS96049 },
}