| article html file updated | 7 February 2020 09:42 CET | Update | https://www.mdpi.com/2076-0787/5/2/40 |
| article html file updated | 21 September 2019 18:25 CEST | Update | - |
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| article html file updated | 27 March 2019 06:36 CET | Update | - |
| article html file updated | 3 June 2016 09:13 CEST | Original file | - |
| article xml uploaded. | 3 June 2016 09:12 CEST | Original file | https://www.mdpi.com/2076-0787/5/2/40/xml |
| article pdf uploaded. | 3 June 2016 09:12 CEST | Version of Record | https://www.mdpi.com/2076-0787/5/2/40/pdf |
