(2006)  Page(s) 68, 71.  
 
p. 68: ...identical phenotypes were found within OGR cultivars for R. xcentifolia L. 'Rubra' and 'Crested Moss' for 'Kazanlik', 'Quatre Saisons Blanc Mousseux' and 'York and Lancaster', and for 'Old Blush' and 'Viridiflora'.

p. 71: ʻQuatre Saison Blanc Mousseauxʼ, ʻKazanlikʼ, and ʻYork and Lancasterʼ are clustered as a single allelic phenotype, in agreement with Iwata et al. (2000). The first cultivar is a known sport of ʻQuatre Saisonʼ (selected by M. Laffay prior to 1837) and belongs to the Moss group (Beales et al., 1998; Cairns, 2000; Harkness, 1978); ʻKazanlikʼ and ʻYork and Lancasterʼ are two accessions of unknown origin morphologically similar to ʻQuatre Saisonʼ with deep pink and pink blended fl owers, respectively.