REFERENCES
- BERZTISS , A. T. , 1971 , Data Structures-Theory and Practice ( New York Academic Press ).
- DEO , N. , 1974 , Graph Theory ( Englewood Cliffs , NJ Prentice-Hall ).
- HALL , M. , 1956 , Am. math. Mon. , 63 , 716 .
- HARARY , F. , NORMAN , R. Z. , and CARTWRIGHT , D. , 1965 , Structural Models-an Introduction to the Theory of Directed Graphs ( New York John Wiley ).
- HOPCROFT , J. E. , and KARP , R. M. , 1973 , SI AM J. Comput. , 2 , 225 .
- KEVORKIAN , A. K. , 1975 , Sixth Triennial World Congress of IF AC , Boston .
- ROMANOWICZ , T. M. , 1983 , I.E.E.E. Trans. Syst. Man Cyber. , 13 , 413 .
- SAGE , A. P. , 1977 , Methodology for Large-Scale Systems ( New York McGraw-Hill ).
- ŠIUAK , D. D. , 1978 , Large-scale Dynamic Systems ( New York North-Holland ).
- STEWARD , D. V. , 1962 , SI AM Rev. , 4 , 321 .
- TARJAN , R. E. , 1972 , SI AM J. Comput. , 1 , 146 .
- WARFIBLD , J. N. , 1976 , Societal Systems ( New York John Wiley ).