Chudnovsky, Maria; Seymour, Paul (2005). "The structure of claw-free graphs" (English) . London Math. Soc. Lecture Note Ser. 327: Cambridge: Cambridge Univ. Press. с. 153—171. MR2187738.
Linial, Nathan (2002). "Finite metric spaces–combinatorics, geometry and algorithms" (English) . Proc. International Congress of Mathematicians, Beijing 3. с. 573—586.