| article html file updated | 8 February 2020 06:26 CET | Update | https://www.mdpi.com/2218-6581/6/2/12 |
| article html file updated | 24 September 2019 22:56 CEST | Update | - |
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| article html file updated | 29 June 2017 12:25 CEST | Update | - |
| article html file updated | 24 May 2017 04:13 CEST | Update | - |
| article xml uploaded. | 24 May 2017 04:12 CEST | Update | https://www.mdpi.com/2218-6581/6/2/12/xml |
| article pdf uploaded. | 24 May 2017 04:12 CEST | Updated version of record | https://www.mdpi.com/2218-6581/6/2/12/pdf |
| article html file updated | 23 May 2017 06:13 CEST | Update | - |
| article pdf uploaded. | 23 May 2017 06:12 CEST | Updated version of record | https://www.mdpi.com/2218-6581/6/2/12/pdf-vor |
| article html file updated | 22 May 2017 12:55 CEST | Original file | - |
| article pdf uploaded. | 22 May 2017 12:54 CEST | Version of Record | https://www.mdpi.com/2218-6581/6/2/12/pdf-vor |
