| article html file updated | 9 February 2020 01:15 CET | Update | https://www.mdpi.com/2304-6740/6/1/3 |
| article html file updated | 29 September 2019 11:58 CEST | Update | - |
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| article html file updated | 26 December 2017 11:11 CET | Original file | - |
| article xml uploaded. | 26 December 2017 11:10 CET | Original file | https://www.mdpi.com/2304-6740/6/1/3/xml |
| article pdf uploaded. | 26 December 2017 11:10 CET | Version of Record | https://www.mdpi.com/2304-6740/6/1/3/pdf |
