| article html file updated | 8 February 2020 02:27 CET | Update | https://www.mdpi.com/2077-0472/7/4/31 |
| article html file updated | 24 September 2019 01:23 CEST | Update | N/A |
| article html file updated | 4 May 2019 04:35 CEST | Update | N/A |
| article html file updated | 27 April 2017 05:47 CEST | Update | N/A |
| article html file updated | 31 March 2017 13:34 CEST | Update | N/A |
| article xml uploaded. | 31 March 2017 13:33 CEST | Update | https://www.mdpi.com/2077-0472/7/4/31/xml |
| article pdf uploaded. | 31 March 2017 13:33 CEST | Updated version of record | https://www.mdpi.com/2077-0472/7/4/31/pdf |
| article html file updated | 29 March 2017 09:37 CEST | Original file | N/A |
| article pdf uploaded. | 29 March 2017 09:34 CEST | Version of Record | https://www.mdpi.com/2077-0472/7/4/31/pdf-vor |
