| article html file updated | 7 February 2020 07:46 CET | Update | https://www.mdpi.com/2218-1989/6/2/14 |
| article html file updated | 5 May 2019 17:36 CEST | Update | N/A |
| article html file updated | 27 March 2019 02:56 CET | Update | N/A |
| article html file updated | 4 July 2016 06:19 CEST | Original file | N/A |
| article xml uploaded. | 26 April 2016 09:02 CEST | Update | https://www.mdpi.com/2218-1989/6/2/14/xml |
| article pdf uploaded. | 26 April 2016 09:02 CEST | Updated version of record | https://www.mdpi.com/2218-1989/6/2/14/pdf |
| article pdf uploaded. | 26 April 2016 08:58 CEST | Updated version of record | N/A |
