| article html file updated | 7 February 2020 21:36 CET | Update | https://www.mdpi.com/2076-3417/7/1/87 |
| article html file updated | 22 September 2019 22:11 CEST | Update | - |
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| article html file updated | 8 February 2017 09:44 CET | Update | - |
| article html file updated | 17 January 2017 11:28 CET | Original file | - |
| article xml uploaded. | 17 January 2017 11:27 CET | Original file | https://www.mdpi.com/2076-3417/7/1/87/xml |
| article pdf uploaded. | 17 January 2017 11:27 CET | Version of Record | https://www.mdpi.com/2076-3417/7/1/87/pdf |
