| article html file updated | 8 February 2020 02:04 CET | Update | https://www.mdpi.com/2220-9964/6/4/93 |
| article html file updated | 23 September 2019 23:23 CEST | Update | - |
| article html file updated | 4 May 2019 05:23 CEST | Update | - |
| article html file updated | 28 April 2017 08:21 CEST | Update | - |
| article html file updated | 27 March 2017 05:27 CEST | Update | - |
| article html file updated | 24 March 2017 03:22 CET | Original file | - |
| article xml uploaded. | 24 March 2017 03:21 CET | Original file | https://www.mdpi.com/2220-9964/6/4/93/xml |
| article pdf uploaded. | 24 March 2017 03:21 CET | Updated version of record | https://www.mdpi.com/2220-9964/6/4/93/pdf |
| article pdf uploaded. | 23 March 2017 12:04 CET | Version of Record | https://www.mdpi.com/2220-9964/6/4/93/pdf-vor |
