- Chapter 8 of Probability on trees: an introductory climb by Yuval Peres.

- Chapter 1 of Probability on graphs by Geoffrey Grimmett.

- Chapter 2 of Probability on Probability on Trees and Networks by Russell Lyons with Yuval Peres.

- Chapters 3,4,5 of Probability on graphs by Geoffrey Grimmett.

- Percolation, by Grimmett or Bollob\'as-Riordan, both available at the UBC library.
- The Lace Expansion and its Applications by Gordon Slade.