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  1. By: Srivastava, Gopal Krishna - Pant, Divya Darshan - Shukla, Pradeep Kumar
    Type: Article
    In: American fern journal
    Volume: 83
    Date: 1993
    Page Range: 105--119
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Pant, Divya Darshan - Singh, R Shanker
    Type: Article
    In: Palaeontology
    Volume: 11
    Date: 1968
    Page Range: 643--653
    Publication Info: London, Palaeontological Association, 1957-