Window Wars: The leading graphical user interfaces go head to head. Sheldon, K. M., Barron, J. J., & Smith, B. Byte Magazine, 16(6):124–132, 134, June, 1991.
bibtex   
@Article{Sheldon:1991:WWL,
  author =       "K. M. Sheldon and J. J. Barron and B. Smith",
  title =        "Window Wars: The leading graphical user interfaces go
                 head to head",
  journal =      j-BYTE,
  volume =       "16",
  number =       "6",
  pages =        "124--132, 134",
  month =        jun,
  year =         "1991",
  CODEN =        "BYTEDJ",
  ISSN =         "0360-5280 (print), 1082-7838 (electronic)",
  ISSN-L =       "0360-5280",
  bibdate =      "Thu Sep 12 18:39:30 MDT 1996",
  bibsource =    "https://www.math.utah.edu/pub/tex/bib/byte1990.bib",
  acknowledgement = ack-nhfb,
  classification = "C6130B (Graphics techniques); C6180 (User
                 interfaces)",
  keywords =     "Amiga Workbench; Apple Macintosh windows; Ensemble;
                 Graphical user interfaces; GUIs; IBM PC compatible;
                 Motif; NextStep; Open Look; OS/2 Presentation Manager;
                 Personal computers; Unix; Windows 3.0",
  thesaurus =    "Graphical user interfaces; Software packages",
}

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