www.hibiscus-sunnycities.nl            

(website about the Hibiscus work group)

www.plants-for-people.org                

(website about plants in general)

www.healthygreenatwork.org          

(website about the healthy effect of green in the workplace)

www.my-mps.com                           

(website about quality management)

www.greensales.nl                           

(website about organizing sales)