+@Book{lehoucq98,
+ title = "Arpack User's Guide: Solution of Large-Scale
+ Eigenvalue Problems With Implicityly Restorted Arnoldi
+ Methods",
+ author = "R Richard B Lehoucq and D Danny C Sorensen and
+ Chao-Chih Yang",
+ volume = "6",
+ year = "1998",
+ publisher = "Siam",
+}
+