||Porcine circovirus type 1 (PCV-1)
||Allan GM, Ellis JA. Porcine circoviruses: a review. J Vet Diagn Invest. 2000 Jan12(1):3-14. p.4 right column bottom paragraphPubMed ID10690769
|| Allan GM, Phenix KV, Todd D, McNulty MS: 1994, Some biological and physico-chemical properties of porcine circovirus. J Vet Med B 41: 17–26.  Tischer I, Rasch R, Tochtermann G: 1974, Characterization of papovavirus- and picornavirus-like particles in permanent pig kidney cell lines. Zentralbe Bakteriol Org A 226: 153–167.PubMed ID7941842, 4151202
||p.4 right column bottom paragraph: "PCV1 and PCV2 are small (17 nm), icosahedral, nonenveloped viruses (Fig. 2) containing a single-stranded circular DNA genome [ref 50]. The buoyant density of PCV1 in CsCl has been reported at 1.37 g/cm^3 by Tischer [primary source 55] and 1.33–1.34 g/ml by Allan et al., [primary source 9] and a sedimentation coefficient of 57 S, when compared with the known sedimentation coefficient of a bovine enterovirus, has been reported [primary source 9]."