| article html file updated | 8 February 2020 16:09 CET | Update | https://www.mdpi.com/2304-8158/6/9/81 |
| article html file updated | 27 September 2019 03:19 CEST | Update | - |
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| article html file updated | 30 September 2017 10:19 CEST | Update | - |
| article html file updated | 14 September 2017 11:05 CEST | Original file | - |
| article xml uploaded. | 14 September 2017 11:03 CEST | Original file | https://www.mdpi.com/2304-8158/6/9/81/xml |
| article pdf uploaded. | 14 September 2017 11:03 CEST | Version of Record | https://www.mdpi.com/2304-8158/6/9/81/pdf |
