| article html file updated | 7 February 2020 20:56 CET | Update | https://www.mdpi.com/2073-4352/7/1/9 |
| article html file updated | 22 September 2019 18:44 CEST | Update | N/A |
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| article html file updated | 7 February 2017 04:06 CET | Update | N/A |
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| article xml uploaded. | 23 January 2017 10:13 CET | Update | https://www.mdpi.com/2073-4352/7/1/9/xml |
| article xml uploaded. | 23 January 2017 10:13 CET | Update | N/A |
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| article pdf uploaded. | 23 January 2017 09:57 CET | Updated version of record | https://www.mdpi.com/2073-4352/7/1/9/pdf |
| article html file updated | 6 January 2017 12:12 CET | Original file | N/A |
| article pdf uploaded. | 6 January 2017 11:46 CET | Version of Record | https://www.mdpi.com/2073-4352/7/1/9/pdf-vor |
