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Black, Jane and Tonks, Ian (1999) Time series of commodity futures prices. Financial Markets Group Discussion Papers (331). Financial Markets Group, The London School of Economics and Political Science, London, UK.
de Meza, David 
ORCID: 0000-0002-5638-8310 and Black, Jane
(1994)
The nature of credit market failure.
Economics Letters, 46 (3).
pp. 243-249.
ISSN 0165-1765
