| article html file updated | 6 February 2020 14:35 CET | Update | https://www.mdpi.com/2227-9032/2/4/505 |
| article html file updated | 20 September 2019 16:09 CEST | Update | N/A |
| article html file updated | 7 May 2019 03:43 CEST | Update | N/A |
| article html file updated | 25 March 2019 19:30 CET | Update | N/A |
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| article html file updated | 21 August 2015 04:26 CEST | Original file | N/A |
| article pdf uploaded. | 18 December 2014 15:49 CET | Version of Record | https://www.mdpi.com/2227-9032/2/4/505/pdf |
