Bocea, Marian
Mihăilescu, Mihai
Funding for this research was provided by:
National Science Foundation (DMS-1156393)
CNCS-UEFISCDI (PN-II-ID-PCE-2012-4-0021)
Article History
Received: 2 May 2015
Accepted: 28 January 2016
First Online: 26 March 2016
Free to read: This content has been made available to all.