| article html file updated | 7 February 2020 10:12 CET | Update | https://www.mdpi.com/2227-7102/6/2/17 |
| article html file updated | 5 May 2019 12:53 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:33 CET | Update | N/A |
| article html file updated | 21 March 2018 07:08 CET | Update | N/A |
| article xml uploaded. | 21 March 2018 07:06 CET | Update | https://www.mdpi.com/2227-7102/6/2/17/xml |
| article html file updated | 16 June 2016 10:56 CEST | Update | N/A |
| article pdf uploaded. | 16 June 2016 10:54 CEST | Updated version of record | https://www.mdpi.com/2227-7102/6/2/17/pdf |
| article html file updated | 15 June 2016 10:27 CEST | Original file | N/A |
| article pdf uploaded. | 15 June 2016 10:26 CEST | Version of Record | https://www.mdpi.com/2227-7102/6/2/17/pdf-vor |
