Lead and Cu in contaminated urban soils : extraction with chemical reagents and bioluminescent bacteria and yeastPeltola, Pasi; Ivask, Angela; Aström, Mats; Virta, MarkoScience of the total environment2005 / 1/3, p. 193-203 : ill https://www.sciencedirect.com/science/article/pii/S0048969705000707