[R-pkg-devel] DESCRIPTION file errors

Hello,
I submitted a new package to CRAN, and received the following error message.
# start error message
  Possibly mis-spelled words in DESCRIPTION:
     Bunn (12:30)
     Couper (12:39)
     EV (11:10)
     Follmann (14:40)
     JF (14:25)
     Kolecki (14:29)
     Leifer (14:5)
     Slud (11:5)
     Troendle (14:16)

   Malformed Description field: should contain one or more complete
sentences.
# end error message
I believe I am getting the error message because I am including references
in the Description field of my DESCRIPTION file.  Here's what my
Description field looks like:
# start Description field
Description:
     Used for the design and analysis of a 2x2 factorial trial for
     a time-to-event endpoint.  Performs power calculations and significance
     testing.  Important reference papers include
     Slud EV. (1994) <https://www.ncbi.nlm.nih.gov/pubmed/8086609>
     Lin DY, Gong J, Gallo P, Bunn PH, Couper D. (2016)
     <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5026867>
     Leifer ES, Troendle JF, Kolecki A, Follmann DA. (2019)
     <
https://github.com/EricSLeifer/factorial2x2/blob/master/Leifer%20et%20al%20Factorial.pdf

# end Description field
Question:  should I be including my references in a different format in the
Description field?  Should I include references in my DESCRIPTION file at
all?

Thank you in advance for any help.
Eric

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