● Levantesi C,Rossetti S,Thelen K,Kragelund C,Krooneman J,Eikelboom D,Nielsen PH,Tandoi V (2006). Phylogeny, physiology and distribution of 'Candidatus Microthrix calida', a new Microthrix species isolated from industrial activated sludge wastewater treatment plants. Environ. Microbiol.8, 1552-63.