KLOBUČNÍK, Miroslav et al. Crossability of putative hybrids of Pinus sylvestris and Pinus mugo with their parents. In American journal of plant sciences. ISSN 2158-2742, 2021, vol. 12, no. 8, p. 1246-1258. VEGA 2/0022/20 ; APP0043. Dostupné na internete: <https://www.scirp.org/pdf/ajps_2021082010154919.pdf>