| article html file updated | 12 February 2020 07:08 CET | Update | https://www.mdpi.com/2227-9067/6/4/61 |
| article html file updated | 18 October 2019 19:59 CEST | Update | N/A |
| article html file updated | 8 May 2019 20:12 CEST | Update | N/A |
| article pdf uploaded. | 8 May 2019 11:16 CEST | Updated version of record | https://www.mdpi.com/2227-9067/6/4/61/pdf |
| article html file updated | 25 April 2019 08:08 CEST | Update | N/A |
| article html file updated | 25 April 2019 06:21 CEST | Update | N/A |
| article pdf uploaded. | 25 April 2019 06:20 CEST | Updated version of record | https://www.mdpi.com/2227-9067/6/4/61/pdf-vor |
| article xml uploaded. | 25 April 2019 06:20 CEST | Update | https://www.mdpi.com/2227-9067/6/4/61/xml |
| article xml file uploaded | 25 April 2019 06:20 CEST | Update | N/A |
| article html file updated | 23 April 2019 09:34 CEST | Original file | N/A |
| article pdf uploaded. | 23 April 2019 09:32 CEST | Version of Record | https://www.mdpi.com/2227-9067/6/4/61/pdf-vor |
| article xml file uploaded | 23 April 2019 09:32 CEST | Original file | N/A |