| article html file updated | 9 February 2020 05:17 CET | Update | https://www.mdpi.com/2227-9059/6/1/13 |
| article html file updated | 30 September 2019 11:11 CEST | Update | - |
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| article html file updated | 26 March 2018 15:55 CEST | Update | - |
| article html file updated | 2 February 2018 10:59 CET | Original file | - |
| article xml uploaded. | 2 February 2018 09:21 CET | Original file | https://www.mdpi.com/2227-9059/6/1/13/xml |
| article pdf uploaded. | 2 February 2018 09:21 CET | Version of Record | https://www.mdpi.com/2227-9059/6/1/13/pdf |
