Agnieszka Zawadzińska, and Piotr Salachna. “Sewage Sludge Compost As Potting Media Component for Ivy Pelargonium (Pelargonium Peltatum (L.) L’Her.) Production”. Journal of Basic & Applied Sciences, vol. 10, Jan. 2014, pp. 519-24, doi:10.6000/1927-5129.2014.10.69.