1. Fractal and Topological Properties of Directed Fractures 
    G. Caldarelli, C. Castellano and A. Vespignani,
    Physical Review E 49, 2673 (1994)
  2. Fixed Scale Transformation Approach for Born Model of Fractures
    G. Caldarelli and A. Vespignani,
    Fractals 3, 829 (1995).
  3. Fixed Scale Transformation for Fracture Growth Processes Governed by Vectorial Fields
    G. Caldarelli, A. Vespignani and L. Pietronero,
    Physica A 215, 223 (1995).
  4. Quenched Disorder, Memory and Self Organization
    M. Marsili, G. Caldarelli and M. Vendruscolo,
    Physical Review E 53, R13-R16 (1996)
  5. Optimal path and Directed Percolation
    P. De Los Rios, G. Caldarelli, A. Maritan and F. Seno
    Physical Review E 53, R2029-R2032 (1996).
  6. Self Organization and Annealed Disorder in Fracturing Processes
    G. Caldarelli, F. Di Tolla, A. Petri,
    Physical Review Letters 77, 2503-2508 (1996).
  7. Surface Effects on Invasion Percolation
    R. Cafiero, G. Caldarelli, A. Gabrielli,
    Physical Review E 56, R1291-R1293 (1997).
  8. Dynamics of Fractures in Quenched Disordered Media
    G. Caldarelli, R. Cafiero, A. Gabrielli,
    Physical Review E 57, 3878-3885 (1998).
  9. Stationary Self-Organized Fractal Structures in an Open, Dissipative Electrical System
    M. Marani, J. R. Banavar, G. Caldarelli A. Maritan, A. Rinaldo,
    Journal of Physics A 31, L337-L343 (1998).
  10. Theory of Boundary Effects in Invasion Percolation
    A. Gabrielli, R. Cafiero, G. Caldarelli,
    Journal of Physics A 31, 7429 (1998).
  11. Statistical Properties of Fractures in Damaged Materials
    A. Gabrielli, R. Cafiero, G. Caldarelli,
    Europhysics Letters 45, 13 (1999).
  12. Comment on First Order Transition in the Breakdown of Disordered Media
    G. Caldarelli, A.Petri,
    Physical Review Letters 83,1483 (1999).
  13. Criticality in Model for Fractures in Disordered Media
    G. Caldarelli, C. Castellano, A. Petri,
    Physica A 270, 15 (1999).
  14. Critical behaviour in the fracture of disordered media
    G. Caldarelli, C. Castellano, A. Petri,
    Philosophical Magazine B 79 1939-1944 (1999).
  15. Roughness of fracture surfaces
    A. Parisi, G. Caldarelli, L. Pietronero,
    Europhysics Letters 52 304, (2000)
  16. Discretized Diffusion Processes
    S. Ciliberti, G. Caldarelli, P. De Los Rios, L. Pietronero Y.-C. Zhang,
    Physical Review Letters 85 4848-4851 (2000).
  17. Angular structure of Lacunarity and Renormalization Group
    R.C. Ball, G. Caldarelli, A. Flammini,
    Physical Review Letters 85, 5134 (2000)
  18. Damaging and Cracks in Thin Mud Layers
    R. Cafiero, G. Caldarelli, A. Gabrielli,
    Journ. of Phys. A 45, 8013 (2000).
  19. Invasion Percolation with Temperature and the Nature of SOC in Real Systems
    A. Gabrielli, G. Caldarelli, L. Pietronero,
    Physical Review E, 62, 7638 (2000)
  20. Beauty and Distance in the Stable Marriage Problem
    G. Caldarelli, A. Capocci,
    Physica A 300, 325 (2001)
  21. A Perturbative approach to the Bak and Sneppen Model
    M. Felici, G. Caldarelli, A. Gabrielli, L. Pietronero,
    Physical Review Letters 86, 1896 (2001).
  22. Fractal growth from Local Instabilities
    R. Cafiero, G. Caldarelli,
    Europhysics Letters 54, 187 (2001).
  23. Percolation in Real Wildfires
    G. Caldarelli, R. Frondoni, A. Gabrielli, M. Montuori, R. Retzlaff, C. Ricotta,
    Europhysics Letters 56, 510 (2001).
  24. A Probablistic approach to the Bak Sneppen Model
    G. Caldarelli, M. Felici, A. Gabrielli, L. Pietronero, 
    Physical Review E 65, 046101 (2002).
  25. Local Rigidity in Sandpile Models.
    S. Ciliberti, G. Caldarelli, V. Loreto, L. Pietronero,
    Physical Review E 66 016133, (2002).
  26. Reply to the comment on Percolation in Real Wildfires.
    G. Caldarelli, R. Frondoni, A. Gabrielli, M. Montuori, R. Retzlaff, C. Ricotta
    Europhysics Letters 59 157, (2002).
  27. Dynamic Fracture Model for Acoustic Emission.
    M. Minozzi, G. Caldarelli, L. Pietronero, S. Zapperi,
    European Physical Journal B 36 203 (2003).
  28. The Drainage Basins Trees in Mars Channel Networks.
    G. Caldarelli, P. De Los Rios, M. Montuori, V.D.P. Servedio,
    European Physical Journal B 38 387-391 (2004).