Αυτός ο κόσμος ο μικρός,
Does mass change with velocity?
Arguments against the term "relativistic mass" are given in the classic relativity text book "Space-Time Physics" by Taylor and Wheeler, 2nd edition, Freeman Press (1992).
The article "Does mass really depend on velocity, dad?" by Carl E Adler, American Journal of Physics 55, 739 (1987) also discusses this subject and includes the above quote from Einstein against the use of relativistic mass
Einstein's original papers can be found in English translation in "The Principle of Relativity" by Einstein and others, Dover Press
Some other historical details can be found in "Concepts of mass" by Max jammer
and "Einstein's Revolution" by Elie Zahar.