Kaarin Mäkikallio, ANP, in Placental insufficiency and fetal heart: Doppler ultrasonographic and biochemical markers of fetal cardiac dysfunction, Oulu, Oulun yliopisto, 2002, ISBN951-42-6737-0, OCLC58358685.
Kaarin Mäkikallio, ANP, in Placental insufficiency and fetal heart: Doppler ultrasonographic and biochemical markers of fetal cardiac dysfunction, Oulu, Oulun yliopisto, 2002, ISBN951-42-6737-0, OCLC58358685.