This is one of a series of articles on directed word chain networks. The concept of a directed word chain network, together with definitions of various terms used to characterize such networks, was introduced in Part 1 of this series. The concept of a word chain dates back at least to Dudeney's 1925 book, "The World's Best Word Puzzles" (largely reprinted as "300 Best Word Puzzles" by Dover in 1968).
"Directed Word Chain Networks (Part 2),"
Word Ways: Vol. 24
, Article 10.
Available at: http://digitalcommons.butler.edu/wordways/vol24/iss3/10