| article html file updated | 6 February 2020 19:29 CET | Update | https://www.mdpi.com/2227-7390/3/2/481 |
| article html file updated | 20 September 2019 22:32 CEST | Update | - |
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| article html file updated | 26 March 2019 04:21 CET | Update | - |
| article html file updated | 21 August 2015 13:19 CEST | Update | - |
| article html file updated | 24 July 2015 08:40 CEST | Original file | - |
| article xml file uploaded | 24 July 2015 08:40 CEST | Original file | https://www.mdpi.com/2227-7390/3/2/481/xml |
| article pdf uploaded. | 8 June 2015 15:25 CEST | Version of Record | https://www.mdpi.com/2227-7390/3/2/481/pdf |
