Hirsilä, M., Kauppila, J., Tuomaala, K., Grekula, B., Puhakka, T., Ruuskanen, O., & Ziegler, T. (2001). Detection by Reverse Transcription–Polymerase Chain Reaction of Influenza C in Nasopharyngeal Secretions of Adults with a Common Cold. J Infect Dis.

Hirsilä, Maija, Jaana Kauppila, Katri Tuomaala, Birgitta Grekula, Tuomo Puhakka, Olli Ruuskanen, and Thedi Ziegler. "Detection By Reverse Transcription–Polymerase Chain Reaction of Influenza C in Nasopharyngeal Secretions of Adults With a Common Cold." J Infect Dis 2001.

Hirsilä, Maija, et al. "Detection By Reverse Transcription–Polymerase Chain Reaction of Influenza C in Nasopharyngeal Secretions of Adults With a Common Cold." J Infect Dis 2001.