1. What Is Loose Cargo and Their Suitable Trailers?https://www.haulio.io/blog/what-is-loose-cargo-and-suitable-trailers/
2. What Are Bulk Materials?https://tworzywa.org/artykuly/szczegoly/61624_czym-sa-materialy-sypkie
3. Transport of Loose Materialshttp://www.locotranssped.pl/en/?transport-of-loose-materials
4. Transport of Loose Materialshttp://www.freshcargo.pl/en/oferta/transport-von-losem-material/
5. Transport with Silos Semi-trailershttp://procem.pl/transport-of-loose-materials.html