Crisafulli, Benedetta (2023) Service guarantee. In: Gallouj, F. and Gallouj, C. and Monnoyer, M.-C. and Rubalcaba, L. (eds.) Elgar Encyclopedia of Services. Elgar Encyclopedias in the Social Sciences. Edward Elgar Publishing, pp. 259-260. ISBN 9781802202588.

Antonelli, C. and Patrucco, P.P. and Rossi, Federica (2010) The economics of knowledge interaction and the changing role of universities. In: Gallouj, F. and Djellal, F. (eds.) The Handbook Of Innovation And Services: A Multi-disciplinary Perspective. Elgar original reference. Cheltenham, UK: Edward Elgar. ISBN 9781847205049.