TY  - BOOK
AU  - Zyskind, George.
TI  - On best linear estimation and a general Gauss-Markov theorem in linear models with arbitrary nonnegative covariance structure
KW  - Programación lineal
N1  - Sobretiro de: SIAM. J. Applied Math. 17(6): 1190-1202, 1969
ER  -