| article html file updated | 9 February 2020 01:14 CET | Update | https://www.mdpi.com/2227-9059/6/1/4 |
| article html file updated | 29 September 2019 11:50 CEST | Update | - |
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| article html file updated | 18 April 2019 04:03 CEST | Update | - |
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| article html file updated | 26 March 2018 15:51 CEST | Update | - |
| article html file updated | 26 December 2017 08:24 CET | Original file | - |
| article xml uploaded. | 26 December 2017 08:22 CET | Update | https://www.mdpi.com/2227-9059/6/1/4/xml |
| article xml uploaded. | 26 December 2017 08:22 CET | Original file | - |
| article pdf uploaded. | 26 December 2017 08:22 CET | Version of Record | https://www.mdpi.com/2227-9059/6/1/4/pdf |
