| article html file updated | 8 February 2020 02:34 CET | Update | https://www.mdpi.com/2218-1989/7/2/13 |
| article html file updated | 24 September 2019 02:03 CEST | Update | N/A |
| article html file updated | 4 May 2019 04:21 CEST | Update | N/A |
| article html file updated | 28 June 2017 13:53 CEST | Update | N/A |
| article html file updated | 30 March 2017 11:12 CEST | Original file | N/A |
| article xml uploaded. | 30 March 2017 11:11 CEST | Original file | https://www.mdpi.com/2218-1989/7/2/13/xml |
| article pdf uploaded. | 30 March 2017 11:11 CEST | Version of Record | https://www.mdpi.com/2218-1989/7/2/13/pdf |
