Cornelissen LG, van Oostrum NH, van der Woude DA, Rolf C, Porath MM, Oei SG, van Laar JO (March 2020). "The diagnostic value of fetal fibronectin testing in clinical practice". The Journal of Obstetrics and Gynaecology Research. 46 (3): 405–412. doi:10.1111/jog.14201. PMID31955485. S2CID210831801.
Cornelissen LG, van Oostrum NH, van der Woude DA, Rolf C, Porath MM, Oei SG, van Laar JO (March 2020). "The diagnostic value of fetal fibronectin testing in clinical practice". The Journal of Obstetrics and Gynaecology Research. 46 (3): 405–412. doi:10.1111/jog.14201. PMID31955485. S2CID210831801.
Cornelissen LG, van Oostrum NH, van der Woude DA, Rolf C, Porath MM, Oei SG, van Laar JO (March 2020). "The diagnostic value of fetal fibronectin testing in clinical practice". The Journal of Obstetrics and Gynaecology Research. 46 (3): 405–412. doi:10.1111/jog.14201. PMID31955485. S2CID210831801.