| article html file updated | 7 February 2020 20:26 CET | Update | https://www.mdpi.com/2076-3417/7/1/34 |
| article html file updated | 22 September 2019 15:54 CEST | Update | - |
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| article html file updated | 8 February 2017 09:07 CET | Update | - |
| article html file updated | 28 December 2016 10:04 CET | Original file | - |
| article xml uploaded. | 28 December 2016 10:03 CET | Original file | https://www.mdpi.com/2076-3417/7/1/34/xml |
| article pdf uploaded. | 28 December 2016 10:03 CET | Version of Record | https://www.mdpi.com/2076-3417/7/1/34/pdf |
