On the partitioned matrix O A A * Q and its associated system A X = T , A * Y + Q X = Z
ESAIM: Mathematical Modelling and Numerical Analysis , Tome 15 (1981) no. 2, pp. 177-184.

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@article{M2AN_1981__15_2_177_0,
     author = {Valerio, Vladimiro},
     title = {On the partitioned matrix $\begin{pmatrix}O&A\\A^\ast &Q\end{pmatrix}$ and its associated system $AX=T, A^\ast Y+QX = Z$},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {177--184},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {15},
     number = {2},
     year = {1981},
     zbl = {0458.15003},
     mrnumber = {618822},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/M2AN_1981__15_2_177_0/}
}
TY  - JOUR
AU  - Valerio, Vladimiro
TI  - On the partitioned matrix $\begin{pmatrix}O&A\\A^\ast &Q\end{pmatrix}$ and its associated system $AX=T, A^\ast Y+QX = Z$
JO  - ESAIM: Mathematical Modelling and Numerical Analysis 
PY  - 1981
SP  - 177
EP  - 184
VL  - 15
IS  - 2
PB  - Centrale des revues, Dunod-Gauthier-Villars
PP  - Montreuil
UR  - https://geodesic-test.mathdoc.fr/item/M2AN_1981__15_2_177_0/
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%0 Journal Article
%A Valerio, Vladimiro
%T On the partitioned matrix $\begin{pmatrix}O&A\\A^\ast &Q\end{pmatrix}$ and its associated system $AX=T, A^\ast Y+QX = Z$
%J ESAIM: Mathematical Modelling and Numerical Analysis 
%D 1981
%P 177-184
%V 15
%N 2
%I Centrale des revues, Dunod-Gauthier-Villars
%C Montreuil
%U https://geodesic-test.mathdoc.fr/item/M2AN_1981__15_2_177_0/
%G en
%F M2AN_1981__15_2_177_0
Valerio, Vladimiro. On the partitioned matrix $\begin{pmatrix}O&A\\A^\ast &Q\end{pmatrix}$ and its associated system $AX=T, A^\ast Y+QX = Z$. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 15 (1981) no. 2, pp. 177-184. https://geodesic-test.mathdoc.fr/item/M2AN_1981__15_2_177_0/