Talk by Elwyn Berlekamp: Dots and Boxes, and related Mathematical Games  
   Streaming-video hour-long special seminar held at MSRI on September 13, 1999 describes the mathematics behind winning strategies.
   http://www.msri.org/activities/events/9900/Berlekamp/

Postings from rec.games.abstract about Dots and Boxes  
   Includes a survey of the mathematical and computational literature.
   http://www.math.niu.edu/~rusin/uses-math/games/other/dots_n_boxes

Talk by Katherine Scott: Loony Dots and Boxes Endgame  
   Streaming-video 30-minute talk held at MSRI during the Combinatorial Game Theory Research Workshop, July 24-28, 2000. Describes a particular type of endgame which arises frequently in practice and can be solved in polynomial time.
   http://www.msri.org/publications/ln/msri/2000/gametheory/scott/1/

Dots-and-Boxes Analysis  
   Analysis program and results.
   http://www.cae.wisc.edu/~dwilson/boxes/

Eric Weisstein's World of Mathematics: Dots and Boxes  
   Entry with rules, basic strategy, and references.
   http://mathworld.wolfram.com/DotsandBoxes.html

Connect Capture  
   A game mixing dots and boxes with chess. Completing a box activates the enclosed chess piece, capturing other activated chess pieces.
   http://www.geocities.com/alpine_rick_2000

Stop Gate  
   A variation of Dots and Boxes that can be played on a checkerboard or on paper.
   http://www.cs.uidaho.edu/~casey931/conway/stopg.html

Dots and Boxes - Dots and Hexagons  
   Reviews standard rules, and introduces the analogous game on a hexagonal board.
   http://www.drking.plus.com/hexagons/dots/