1. Aho AV, Hopcroft JE, Ullman JD (1974) The Design and Analysis of Computer Algorithms. Addison-Wesley, Reading MA
2. Arikati SR, Maheshwari A, Zaroliagis CD (1997) Efficient computation of implicit representations of sparse graphs. Discrete Applied Mathematics 78(1–3):1–16
3. Lecture Notes in Computer Science;JL Balcázar,1989
4. Bang-Jensen J, Gutin G (2001) Digraphs: Theory. Algorithms and Applications. Springer, Berlin Heidelberg
5. Bentley JL (2000) Programming Pearls, 2nd edn. ACM Press, New York NY