| article html file updated | 9 February 2020 11:47 CET | Update | https://www.mdpi.com/2226-471X/3/2/9 |
| article html file updated | 2 October 2019 02:29 CEST | Update | N/A |
| article html file updated | 1 May 2019 07:35 CEST | Update | N/A |
| article html file updated | 17 April 2019 07:33 CEST | Update | N/A |
| article html file updated | 29 March 2019 11:02 CET | Update | N/A |
| article html file updated | 30 March 2018 10:52 CEST | Original file | N/A |
| article xml uploaded. | 30 March 2018 10:51 CEST | Original file | https://www.mdpi.com/2226-471X/3/2/9/xml |
| article pdf uploaded. | 30 March 2018 10:51 CEST | Updated version of record | https://www.mdpi.com/2226-471X/3/2/9/pdf |
| article pdf uploaded. | 29 March 2018 17:47 CEST | Version of Record | https://www.mdpi.com/2226-471X/3/2/9/pdf-vor |