| article html file updated | 8 February 2020 03:07 CET | Update | https://www.mdpi.com/2077-1444/8/4/61 |
| article html file updated | 4 May 2019 03:08 CEST | Update | - |
| article html file updated | 28 April 2017 07:14 CEST | Update | - |
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| article html file updated | 7 April 2017 13:11 CEST | Update | - |
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| article html file updated | 7 April 2017 13:11 CEST | Original file | - |
| article xml uploaded. | 7 April 2017 13:09 CEST | Original file | https://www.mdpi.com/2077-1444/8/4/61/xml |
| article pdf uploaded. | 7 April 2017 13:09 CEST | Version of Record | https://www.mdpi.com/2077-1444/8/4/61/pdf |
