| article html file updated | 8 February 2020 01:10 CET | Update | https://www.mdpi.com/2304-6775/5/1/4 |
| article html file updated | 23 September 2019 18:07 CEST | Update | N/A |
| article html file updated | 4 May 2019 07:22 CEST | Update | N/A |
| article html file updated | 30 March 2017 08:54 CEST | Update | N/A |
| article html file updated | 10 March 2017 08:18 CET | Original file | N/A |
| article xml uploaded. | 10 March 2017 08:17 CET | Original file | https://www.mdpi.com/2304-6775/5/1/4/xml |
| article pdf uploaded. | 10 March 2017 08:17 CET | Version of Record | https://www.mdpi.com/2304-6775/5/1/4/pdf |
