* Nelson, Richard; [http://www.nber.org/chapters/c2141 ''The link between science and invention: the case of the transistor''] (El vínculo entre la ciencia y la invención: el caso del transistor). En ''The rate and direction of inventive activity: economic and social factors'' (El ritmo y rumbo de la inventiva: factores económicos y sociales); National Bureau of Economic Research; EEUU; ISBN 08701430402; pp. 549‑584.