| article html file updated | 8 February 2020 20:24 CET | Update | https://www.mdpi.com/2313-4321/2/4/21 |
| article html file updated | 28 September 2019 06:15 CEST | Update | N/A |
| article html file updated | 2 May 2019 16:49 CEST | Update | N/A |
| article html file updated | 7 November 2017 10:44 CET | Update | N/A |
| article xml uploaded. | 7 November 2017 10:43 CET | Update | https://www.mdpi.com/2313-4321/2/4/21/xml |
| article pdf uploaded. | 7 November 2017 10:43 CET | Updated version of record | https://www.mdpi.com/2313-4321/2/4/21/pdf |
| article html file updated | 6 November 2017 11:33 CET | Original file | N/A |
| article xml uploaded. | 6 November 2017 11:32 CET | Original file | N/A |
| article pdf uploaded. | 6 November 2017 11:32 CET | Updated version of record | https://www.mdpi.com/2313-4321/2/4/21/pdf-vor |
| article pdf uploaded. | 5 November 2017 10:43 CET | Version of Record | https://www.mdpi.com/2313-4321/2/4/21/pdf-vor |
