E. Hartati, I. Ismoedijanto, and S. Soegijanto, “Comparison of Neutralizing Antibody Response to Type 1 Polio Virus on Healthy Infants Receiving either Oral Monovalen Polio Vaccine Type 1 or Oral Trivalen Polio Vaccine Given with Basic DTP/Hb Immunization”, IJTID, vol. 1, no. 1, pp. 5–9, Apr. 2010.