| article html file updated | 6 February 2020 08:40 CET | Update | https://www.mdpi.com/2227-9059/2/2/163 |
| article html file updated | 7 May 2019 15:46 CEST | Update | N/A |
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| article html file updated | 23 February 2017 02:22 CET | Update | N/A |
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| article html file updated | 24 June 2014 12:02 CEST | Original file | N/A |
| article xml file uploaded | 24 June 2014 12:02 CEST | Original file | https://www.mdpi.com/2227-9059/2/2/163/xml |
| article pdf uploaded. | 17 April 2014 08:33 CEST | Version of Record | https://www.mdpi.com/2227-9059/2/2/163/pdf |
