![Genetic and biological characterization of a Porcine Reproductive and Respiratory Syndrome Virus 2 (PRRSV-2) causing significant clinical disease in the field - ScienceDirect Genetic and biological characterization of a Porcine Reproductive and Respiratory Syndrome Virus 2 (PRRSV-2) causing significant clinical disease in the field - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0378113517305096-gr3.jpg)
Genetic and biological characterization of a Porcine Reproductive and Respiratory Syndrome Virus 2 (PRRSV-2) causing significant clinical disease in the field - ScienceDirect
![Large-scale solar thermal systems in leading countries: A review and comparative study of Denmark, China, Germany and Austria - ScienceDirect Large-scale solar thermal systems in leading countries: A review and comparative study of Denmark, China, Germany and Austria - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0306261920305092-gr1.jpg)
Large-scale solar thermal systems in leading countries: A review and comparative study of Denmark, China, Germany and Austria - ScienceDirect
![PDF) A nitrogen budget for Denmark; Developments between 1990 and 2010, and prospects for the future PDF) A nitrogen budget for Denmark; Developments between 1990 and 2010, and prospects for the future](https://i1.rgstatic.net/publication/268884357_A_nitrogen_budget_for_Denmark_Developments_between_1990_and_2010_and_prospects_for_the_future/links/548eed840cf2d1800d861b52/largepreview.png)