| article html file updated | 7 February 2020 22:11 CET | Update | https://www.mdpi.com/2306-5354/4/1/9 |
| article html file updated | 23 September 2019 01:20 CEST | Update | N/A |
| article html file updated | 4 May 2019 13:40 CEST | Update | N/A |
| article html file updated | 29 March 2017 06:08 CEST | Update | N/A |
| article html file updated | 25 January 2017 08:40 CET | Original file | N/A |
| article xml uploaded. | 25 January 2017 08:39 CET | Original file | https://www.mdpi.com/2306-5354/4/1/9/xml |
| article pdf uploaded. | 25 January 2017 08:39 CET | Version of Record | https://www.mdpi.com/2306-5354/4/1/9/pdf |
