| article html file updated | 12 February 2020 07:37 CET | Update | https://www.mdpi.com/2076-0752/8/2/56 |
| article html file updated | 4 July 2019 16:27 CEST | Update | N/A |
| article html file updated | 15 May 2019 11:57 CEST | Original file | N/A |
| article pdf uploaded. | 15 May 2019 11:55 CEST | Updated version of record | https://www.mdpi.com/2076-0752/8/2/56/pdf |
| article xml uploaded. | 15 May 2019 11:55 CEST | Update | https://www.mdpi.com/2076-0752/8/2/56/xml |
| article xml file uploaded | 15 May 2019 11:55 CEST | Update | N/A |
| article pdf uploaded. | 25 April 2019 05:49 CEST | Version of Record | https://www.mdpi.com/2076-0752/8/2/56/pdf-vor |
| article xml file uploaded | 25 April 2019 05:49 CEST | Original file | N/A |
