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Valkovsky I, Olsanska R, Tvrdik J, Martinek A, Svagera Z, Pernicova M, Dedochova J, Cermakova Z.Valkovsky I, et al. Among authors: tvrdik j.Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 2015 Mar;159(1):93-9. doi: 10.5507/bp.2013.087. Epub 2013 Nov 29.Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 2015.PMID: 24322342Free article.
Lochmanová A, Lochman I, Tvrdík J.Lochmanová A, et al. Among authors: tvrdik j.Cesk Epidemiol Mikrobiol Imunol. 1984 Jul;33(4):211-5.Cesk Epidemiol Mikrobiol Imunol. 1984.PMID: 6237745Czech.No abstract available.
Lochman I, Wieczorková D, Miler I, Tvrdík J, Lochmanová A, Machálek J.Lochman I, et al. Among authors: tvrdik j.Cesk Pediatr. 1987 Feb;42(2):93-6.Cesk Pediatr. 1987.PMID: 3568183Czech.No abstract available.