| article html file updated | 9 February 2020 20:58 CET | Update | https://www.mdpi.com/2076-0752/7/2/21 |
| article html file updated | 30 April 2019 12:08 CEST | Update | N/A |
| article html file updated | 16 April 2019 12:32 CEST | Update | N/A |
| article html file updated | 16 April 2019 07:15 CEST | Update | N/A |
| article html file updated | 30 March 2019 09:31 CET | Update | N/A |
| article html file updated | 27 June 2018 19:43 CEST | Update | N/A |
| article html file updated | 11 June 2018 06:40 CEST | Original file | N/A |
| article pdf uploaded. | 11 June 2018 06:38 CEST | Version of Record | https://www.mdpi.com/2076-0752/7/2/21/pdf |
| article xml uploaded. | 11 June 2018 06:38 CEST | Update | https://www.mdpi.com/2076-0752/7/2/21/xml |
| article xml file uploaded | 11 June 2018 06:38 CEST | Original file | N/A |
