| article html file updated | 7 February 2020 07:18 CET | Update | https://www.mdpi.com/2075-4701/6/4/87 |
| article html file updated | 5 May 2019 18:34 CEST | Update | - |
| article html file updated | 27 March 2019 01:57 CET | Update | - |
| article html file updated | 28 April 2016 12:11 CEST | Update | - |
| article pdf uploaded. | 20 April 2016 03:04 CEST | Updated version of record | https://www.mdpi.com/2075-4701/6/4/87/pdf |
| article html file updated | 15 April 2016 08:45 CEST | Original file | - |
| article xml uploaded. | 15 April 2016 08:44 CEST | Update | https://www.mdpi.com/2075-4701/6/4/87/xml |
| article pdf uploaded. | 15 April 2016 08:44 CEST | Version of Record | https://www.mdpi.com/2075-4701/6/4/87/pdf-vor |
