The authors study technology transfer (TT) in a duopoly model with heterogeneous goods under quantity and price competition. They prove that some but not all the properties of TT under homogeneous goods are preserved in their framework.
Link
http://econpapers.repec.org/scripts/redir.pl?u=http%3A%2F%2Fdocubib.uc3m.es%2FWORKINGPAPERS%2FWE%2Fwe057036.pdf;h=repec:cte:werepe:we057036