［1]Bressan A.  Contractive metrics fornonlinear hyperbolic systems.   Indiana University Mathematics Journal, 1988, 37(2): 409-420
 
[2]Li Tatsien, Zhou Yi, Kong Dexing.Global classical solutions for general quasilinear hyperbolic systems with decay initial data.  Nonlinear Analysis, Theory, Methods &  Application, 1997, 28(8): 1299-1332   
 
[3]Li Tatsien, Zhou Yi,  Kong Dexing. Weak Linear degeneracy and global classical solutions for generalquasilinear hyperbolic systems.  Comm  in PDE,  1994, 19(7&8): 1263-1317
 
[4]Li Tatsien,  Kong Dexing.  Global     Classical Solutions with Small Amplitude for General Quasilniear Hyperbolic Systems.  New Approaches in Nonlinear Analysis. FL USA:Hadronic Press, 1999. 203-237
 
[5]Kong Dexing. Breakdown of classicalsolutions for quasilinear hyperbolic systems with slow decainitial data. Chin  Ann of Math, 2000, 21B(4): 413-44   
[6]Yan Ping.  Global existence of classical solution  with small initial total variation forquasilinear linearly degenerate Hyperbolic Systems. Journal of PDE, 2003,16(4): 321-334

[7]John F.  Formation of sigularities in onedimensional nonlinear wave propagation.  Comm PureAppl Math, 1974,27377-405

[8]Li Tatsien,  Yu Wenci.  Boundary Wave Problems for   Quasilinear Hyperbolic Systems Duck University Mathematics Series. NC USA: Duke University, 1985. 64-72