Tsvetelina Batsalova; Ivanka Teneva; Detelina Belkinova; Plamen Stoyanov; Snezhana Rusinova-Videva; Balik Dzhambazov. Assessment of Cadmium, Nickel and Lead Toxicity by Using Green Algae Scenedesmus Incrassatulus and Human Cell Lines: Potential In Vitro Test-Systems for Monitoring of Heavy Metal Pollution. TFM 2017, 2, 63-73.