| article html file updated | 7 February 2020 09:35 CET | Update | https://www.mdpi.com/2227-9059/4/2/12 |
| article html file updated | 5 May 2019 14:03 CEST | Update | N/A |
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| article html file updated | 1 June 2016 09:44 CEST | Original file | N/A |
| article xml uploaded. | 1 June 2016 09:43 CEST | Original file | https://www.mdpi.com/2227-9059/4/2/12/xml |
| article pdf uploaded. | 1 June 2016 09:43 CEST | Version of Record | https://www.mdpi.com/2227-9059/4/2/12/pdf |
