| article html file updated | 9 February 2020 05:26 CET | Update | https://www.mdpi.com/2073-4344/8/2/61 |
| article html file updated | 30 September 2019 12:12 CEST | Update | - |
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| article html file updated | 14 March 2018 08:43 CET | Update | - |
| article html file updated | 3 February 2018 11:51 CET | Original file | - |
| article xml uploaded. | 3 February 2018 11:49 CET | Original file | https://www.mdpi.com/2073-4344/8/2/61/xml |
| article pdf uploaded. | 3 February 2018 11:49 CET | Version of Record | https://www.mdpi.com/2073-4344/8/2/61/pdf |
