| article html file updated | 8 February 2020 13:02 CET | Update | https://www.mdpi.com/2077-0472/7/8/68 |
| article html file updated | 3 May 2019 07:57 CEST | Update | N/A |
| article html file updated | 27 March 2019 19:47 CET | Update | N/A |
| article html file updated | 30 August 2017 08:49 CEST | Update | N/A |
| article html file updated | 8 August 2017 08:54 CEST | Original file | N/A |
| article xml uploaded. | 8 August 2017 08:52 CEST | Original file | https://www.mdpi.com/2077-0472/7/8/68/xml |
| article pdf uploaded. | 8 August 2017 08:52 CEST | Version of Record | https://www.mdpi.com/2077-0472/7/8/68/pdf |
