TY  - JOUR
AU  - H. Brzeskwiniewicz
TI  - Latent roots and off-diagonal elements of the association matrix in PBIB designs and the number of associate classes
JO  - Applicationes Mathematicae
PY  - 1991
SP  - 449
EP  - 453
VL  - 21
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/am-21-3-449-453/
DO  - 10.4064/am-21-3-449-453
LA  - en
ID  - 10_4064_am_21_3_449_453
ER  -