How much is too much - equilibrium points for good export and R&D intensity : data of world top 2000 companiesRungi, Mait; Ida, AndresIEEM 2015 : 2015 IEEE International Conference on Industrial Engineering and Engineering Management : 6-9 December 2015, Singapore2015 / p. 1556-1560 : tab http://dx.doi.org/10.1109/IEEM.2015.7385908