ISBN 0-306-47361-5 Kumar, Manish; Sharma, Anjna; Maurya, Indresh Kumar; Thakur, Alpana; Kumar, Sunil. Synthesis of ultra small iron oxide and doped iron oxide
Pvt. Ltd. 2003: 125. ISBN 9788181310002. (原始内容存档于2014-07-04). Chaudhary, Alpana. Of Earth and a star. Rediff.com. 1998-06-03 [2012-01-26]. (原始内容存档于2012-11-04)