| article html file updated | 8 February 2020 09:08 CET | Update | https://www.mdpi.com/2227-9067/4/7/52 |
| article html file updated | 25 September 2019 12:56 CEST | Update | N/A |
| article html file updated | 3 May 2019 15:52 CEST | Update | N/A |
| article html file updated | 28 July 2017 11:09 CEST | Update | N/A |
| article html file updated | 28 June 2017 22:27 CEST | Update | N/A |
| article xml uploaded. | 28 June 2017 09:11 CEST | Update | https://www.mdpi.com/2227-9067/4/7/52/xml |
| article pdf uploaded. | 28 June 2017 09:11 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/7/52/pdf |
| article html file updated | 23 June 2017 15:21 CEST | Original file | N/A |
| article pdf uploaded. | 23 June 2017 15:20 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/7/52/pdf-vor |
