| article html file updated | 7 February 2020 13:48 CET | Update | https://www.mdpi.com/2227-9059/4/3/21 |
| article html file updated | 5 May 2019 06:14 CEST | Update | N/A |
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| article html file updated | 21 February 2017 08:43 CET | Update | N/A |
| article html file updated | 29 September 2016 12:06 CEST | Update | N/A |
| article html file updated | 24 August 2016 15:58 CEST | Original file | N/A |
| article xml uploaded. | 24 August 2016 15:57 CEST | Original file | https://www.mdpi.com/2227-9059/4/3/21/xml |
| article pdf uploaded. | 24 August 2016 15:57 CEST | Version of Record | https://www.mdpi.com/2227-9059/4/3/21/pdf |
