1. J. Anas, M. Billio, L. Ferrara, M. Lo Duca, Business cycle analysis with multivariate Markov switching models, GRETA working paper 04/02, 2004.
2. The European business cycle;Artis;Oxford Econ. Papers,2004
3. Lending cycles;Asea;J. Econometrics,1998
4. Predicting U.S. business cycle regime;Birchenhall;J. Bus. Econ. Stat.,1999
5. Measuring Business Cycles;Burns,1946