References
- Wing , G. M. and Zahrt , J. 1989–90 . Trans. Theory and Stat. Physics , 18 ( 5 and 6 ) : 447
- Hoffman , N. 1985 . J. Quant. Spectrosc. Radia. Transfer , 34 : 435
- Franklin , J. 1968 . Matrix Theory , Englewood Cliffs : Prentice Hall .
- Riesz , F. and Sz-Nagy , B. 1955 . Functional Analysis , New York : Ungar .
- Minc , H. 1988 . Non-negative Matrices , New York : John Wiley and Sons .