| article html file updated | 9 February 2020 05:17 CET | Update | https://www.mdpi.com/2311-5637/4/1/9 |
| article html file updated | 30 September 2019 11:12 CEST | Update | - |
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| article html file updated | 27 March 2018 12:37 CEST | Update | - |
| article html file updated | 2 February 2018 11:21 CET | Original file | - |
| article xml uploaded. | 2 February 2018 09:44 CET | Original file | https://www.mdpi.com/2311-5637/4/1/9/xml |
| article pdf uploaded. | 2 February 2018 09:44 CET | Version of Record | https://www.mdpi.com/2311-5637/4/1/9/pdf |
