| article html file updated | 8 February 2020 18:42 CET | Update | https://www.mdpi.com/2076-3921/6/4/79 |
| article html file updated | 27 September 2019 19:54 CEST | Update | - |
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| article html file updated | 2 January 2018 20:28 CET | Update | - |
| article html file updated | 17 October 2017 16:07 CEST | Original file | - |
| article xml uploaded. | 17 October 2017 16:06 CEST | Original file | https://www.mdpi.com/2076-3921/6/4/79/xml |
| article pdf uploaded. | 17 October 2017 16:06 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/4/79/pdf |
