Defence in depth
Strategic depth
Understanding War: Military History And The Theory Of Combat, Leo Cooper, New York, 1986
Dupuy, Trevor N.
Thompson, Julian, Lifeblood of war: logistics in armed conflict, Brassey's Classics, London, 1991
The Adelphi Papers, Volume 359, Number 1, August 1, 2003 ; S.E. Goodman; D.W. Longhurst, Chapter 2: Strategic Defence Options, pp. 15–24(10)