| article html file updated | 9 February 2020 02:42 CET | Update | https://www.mdpi.com/2075-4663/6/1/2 |
| article html file updated | 2 May 2019 02:59 CEST | Update | - |
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| article html file updated | 27 March 2018 15:44 CEST | Update | - |
| article pdf uploaded. | 12 January 2018 06:36 CET | Updated version of record | https://www.mdpi.com/2075-4663/6/1/2/pdf |
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| article html file updated | 11 January 2018 19:06 CET | Original file | - |
| article xml uploaded. | 11 January 2018 19:04 CET | Original file | https://www.mdpi.com/2075-4663/6/1/2/xml |
| article pdf uploaded. | 11 January 2018 19:04 CET | Version of Record | - |
