Suda, J., Krahulcová, A., Trávníček, P., Rosenbaumová, R., Peckert, T., Krahulec, F. (2007) Genome size variation and species relationships in Hieracium subgen. Pilosella (Asteraceae) as inferred by flow cytometry. Ann. Bot. 100: 1323-1335 [abstract]
Fehrer, J., Gemeinholzer, B., Chrtek, J. Jr, Bräutigam, S. (2007a): Incongruent plastid and nuclear DNA phylogenies reveal ancient intergeneric hybridization in Pilosella hawkweeds (Hieracium, Cichorieae, Asteraceae). Mol. Phylogen. Evol. 42: 347-361 [abstract]
Fehrer, J., Krahulcová, A., Krahulec, F., Chrtek, J. Jr., Rosenbaumová, R., Bräutigam. S. (2007b): Evolutionary aspects in Hieracium subgenus Pilosella. In: Grossniklaus, U., Hörandl, E., Sharbel, T., van Dijk, P. (eds.) Apomixis: Evolution, Mechanisms and Perspectives, Regnum Vegetabile 147, Koeltz, Königstein pp. 359-390 [abstract]
Peckert, T. & Chrtek, J. Jr.: Mating interactions among coexisting diploid, triploid and tetraploid cytotypes of Hieracium echioides (Asteraceae). - Folia Geobot., 41: 323-334 [abstract]
Wilson, L. M., Fehrer, J., Bräutigam, S., Grosskopf, G. (2006): A new invasive hawkweed, Hieracium glomeratum (Lactuceae, Asteraceae), in the Pacific Northwest. - Canad. J. Bot. 84: 133-142 [abstract][ corrected figure 5]
Fehrer, J., Šimek, R., Krahulcová, A., Krahulec, F., Chrtek, J. Jr., Bräutigam, E., Bräutigam, S. (2005): Evolution, hybridisation, and clonal distribution of apo- and amphimictic species of Hieracium subgen. Pilosella (Asteraceae: Lactuceae) in a Central European mountain range. In: F.T. Bakker, L.W. Chatrou, B. Gravendeel & P.B. Pelser: Plant species-level systematics: new perspectives on pattern & process. Regnum Vegetabile 143: 175-201. - Koeltz, Königstein. [abstract] (! size almost 4 MB !)
Mráz, P., Chrtek, J. Jun., Fehrer, J., Plačková, I. (2005): Rare recent natural hybridization in Hieracium s.str. - evidence from morphology, allozymes and chloroplast DNA. - Plant Syst. Evol. 255: 177-192. [abstract]
Chrtek, J. Jr., Mráz, P., Severa, M. (2004): Chromosome numbers in selected species of Hieracium s.str. (Hieracium subgen. Hieracium) in the Western Carpathians. - Preslia 76: 119-139. [abstract]
Krahulcová, A., Papoušková, S., Krahulec, F. (2004): Reproduction mode in the allopolyploid facultatively apomictic hawkweed Hieracium rubrum (Asteraceae, H. subgen. Pilosella). - Hereditas 141: 19-30. [abstract]
Krahulec, F., Krahulcová, A., Fehrer, J., Bräutigam, S., Plačková, I., Chrtek, J. Jr. (2004): The Sudetic group of Hieracium subgen. Pilosella from the Krkonoše Mts: a sythetic view. - Preslia 76: 223-243. [abstract]
Morgan-Richards, M., Trewick, S.A., Chapman, H.M., Krahulcová, A. (2004): Interspecific hybridization among Hieracium species in New Zealand: evidence from flow cytometry. - Heredity 93: 34-42. [abstract]
Štorchová, H., Chrtek, J. Jr., Bartish, I.V., Tetera, M., Kirschner, J., Štěpánek, J. (2002): Genetic variation in agamospermous taxa of Hieracium sect. Alpina (Compositae) in the Tatry Mts. (Slovakia). - Pl. Syst. Evol. 235: 1-17. [abstract]
Krahulcová, A., Krahulec, F., Chapman, H. M. (2000): Variation in Hieracium subgen. Pilosella: what do we know about its sources? - Folia Geobot. 35: 319-338. [abstract]
Štorchová, H., Hrdličková R., Chrtek, J. Jr., Tetera, M., Fitze, D., Fehrer, J. (2000): An improved method of DNA isolation from plants collected in the field and conserved in saturated NaCl/CTAB solution. - Taxon 49: 79-84. [abstract]
Krahulcová, A., Chrtek, J. Jr., Krahulec, F. (1999): Autogamy in Hieracium subgen. Pilosella. - Folia Geobot. 34: 373-376. [abstract]
Chrtek, J. Jr. (1997): Taxonomy of the Hieracium alpinum group in the Sudeten Mts. and the West and Ukrainian East Carpathians. - Folia Geobot. Phytotax. 32: 67-91. [abstract]
Chrtek, J. Jr., Marhold, K. (1998): Taxonomy of the Hieracium fritzei group (Asteraceae) in the Sudeten Mts. and the West Carpathians (Studies in Hieracium sect. Alpina II.). - Phyton (Horn) 37: 181-218. [abstract]
