Need citation for mitocondrial line maintance

[David "Oso" Sierra]

I am in need of a paper or other citation discussing the maitainace of
mitocondria in-vitro over a minimum of 3 generations.  Failing this, a
paper relating to just keeping mitocondria alive in-vitro would be
useful.  I appreciate any help that can be provided in this area.
 
Please email me the citation for any papers on this subject that you are
aware of at the following address: dsierra at lonestar.utsa.edu
 
Thank you,
David Sierra