| article html file updated | 9 February 2020 05:39 CET | Update | https://www.mdpi.com/2309-608X/4/1/20 |
| article html file updated | 30 September 2019 13:28 CEST | Update | - |
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| article html file updated | 28 March 2018 10:26 CEST | Update | - |
| article html file updated | 6 February 2018 12:14 CET | Update | - |
| article xml uploaded. | 6 February 2018 12:12 CET | Update | https://www.mdpi.com/2309-608X/4/1/20/xml |
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| article pdf uploaded. | 6 February 2018 12:12 CET | Updated version of record | https://www.mdpi.com/2309-608X/4/1/20/pdf |
| article html file updated | 6 February 2018 10:54 CET | Original file | - |
| article xml uploaded. | 6 February 2018 10:53 CET | Original file | - |
| article pdf uploaded. | 6 February 2018 10:53 CET | Version of Record | https://www.mdpi.com/2309-608X/4/1/20/pdf-vor |
