52.
"On
the Ponderomotive Forces Exerted
on
Bodies
at
Rest in the
Electromagnetic
Field"
[Einstein
and
Laub
1908b]
Dated
Bern, 7 May
1908
Received
13
May
1908
Published
7
July
1908
In:
Annalen
der
Physik
26
(1908):
541-550.