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APA Citation
Zebitay, A. G., Verit, F. F., Sakar, M. N., Keskin, S., Cetin, O., & Ulusoy, A. I. (2016). importance of cervical length in dysmenorrhoea aetiology. Journal of obstetrics and gynaecology, 36, 540–543. http://access.bl.uk/ark:/81055/vdc_100033976833.0x00000f