Geodesic
The central closure of the simple ``strange'' Lie superalgebras extended over a~commutative algebra
Fundamentalʹnaâ i prikladnaâ matematika, Tome 9 (2003) no. 3, pp. 125-131.

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In this work we study central extensions of Lie superalgebras $g(A)$, where $g=P(n-1)$ are simple Lie superalgebras from one of the so-called “strange” series. We show that universal central extensions of these Lie superalgebras ara trivial, i.e., they are isomorphic to the superalgebras $g(A)$. 
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A. V. Mikhalev; I. A. Pinchuk. The central closure of the simple ``strange'' Lie superalgebras extended over a~commutative algebra. Fundamentalʹnaâ i prikladnaâ matematika, Tome 9 (2003) no. 3, pp. 125-131. http://geodesic.mathdoc.fr/item/FPM_2003_9_3_a8/

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