I was not able to find the origin of the name *Petrov* in the Petrov-Galerkin method for the numerical approximation of PDEs. 


Wikipedia refers to a certain Alexander G. Petrov, but it is still not clear who he was: on the Internet I found two persons called Alexander G. Petrov, both born during the 40's, but I think that the Petrov I am looking for should be born before, since Boris Galerkin lived in 1871-1945.


Can you suggest me any bibliographic resource to consult?


[EDIT: The [Wikipedia page](http://en.wikipedia.org/wiki/Galerkin_method) I was referring to now contains the correct name of Petrov]



Who is Petrov of the Petrov-Galerkin method?
The Petrov you are looking for is: Georgii Ivanovich Petrov (1912-1987), biographies are [here](http://hit2003.narod.ru/persons/great/petrov/petrov_en.html) and [here](http://iopscience.iop.org/0038-5670/30/10/M11;jsessionid=86AE489FDBD558BBF96612B7300CF9ED.c3) and [here.](http://link.springer.com/article/10.1134/S0015462812030015#page-2)


I quote from the third biography:



> 
> G.I. Petrov was a prominent Russian scientist in the field of
>  aerodynamics, gasdynamics, and space research. Even his first studies
>  connected with the investigation of viscous laminar flows attracted
>  the attention of the scientific community. In studying these problems
>  Petrov not only was the first who applied the Galerkin method but also
>  inventively advanced it. It was M.V. Keldysh who noted that they
>  greatly advance the research in the field of fluid flow stability and
>  for that reason the Galerkin method is now justly called the
>  Galerkin-Petrov method.
> 
> 
> 


The key reference is:


G. I. Petrov, *Application of the method of Galerkin to a problem involving the stationary flow of a viscous fluid*, Prikl. Matem. Mekh. **4,** 3 (1940).


