Zahida Nasreen, Shaista Jabeen khan, Ammara Yasmeen, Muafia Shafique and Sakhawat Ali: Optimization of Sub-Merged Culture Conditions for Biomass Production in Schizophyllum commune, a Medicinal Mushroom. International Journal of Current Microbiology and Applied Sciences Vol. 4, 2015, nro 2, s. 258–266. Lahore, Pakistan: Pakistan Counsel of Scientific and Industrial Research. ISSN 2319-7706(englanniksi)