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2. Introduction to Matrix Analysis;Bellman,1960
3. Fractional replication in asymmetrical factorial designs and partially balanced arrays;Chakravarti;Sankhya,1956
4. Determinantenabschǎtzung für binǎre Matrizen;Ehlich;Math. Zeitschrift,1964
5. Computing optimal designs for covariance models;Harville,1975