[2] J. Mařík V. Pták: 
Norms, spectra and combinatorial properties of matrices. Czech. Math. J. 85 (1960), 181-196. 
MR 0120243 
[3] H. K. Huкольский: 
Лекции об операторе сдвига. Mocквa 1980. 
Zbl 0611.73064 
[4] V. Pták: 
Norms and the spectral radius of matrices. Czech. Math. J. 87 (1962), 553 - 557. 
MR 0146190 
[5] V. Pták: 
Rayon spectral, norme des itérés d'un opérateur et exposant critique. C. R. Acad. Sci. Paris 265 (1967), 267-269. 
MR 0220090 | 
Zbl 0162.45604 
[6] V. Pták: 
Spectral radius, norms of iterates and the critical exponent. Lin. Alg. Appl. 1 (1968), 245-260. 
MR 0230744 
[7] V. Pták: 
Isometric parts of operators and the critical exponent. Časopis pro pěst. mat. 101 (1976), 383-388. 
MR 0458214 
[8] V. Pták: 
Universal estimates of the spectral radius. Proceedings of the semester on spectral theory. Banach Center Publ., vol. 8, (Spectral Theory) (1982), 373-387. 
MR 0738301 
[9] V. Pták: 
An infinite companion matrix. Comm. Math. Univ. Carol. 19 (1978), 447-458. 
MR 0508953 
[10] V. Pták: 
A lower bound for the spectral radius. Proc. Amer. Math. Soc. 80 (1980), 435-440. 
MR 0580999 
[11] V. Pták: 
A maximum problem for matrices. Lin. Alg. Appl. 28 (1979), 193 - 204. 
MR 0549433 
[12] V. Pták N. I. Young: 
Functions of operators and the spectral radius. Lin. Alg. Appl. 29 (1980), 357-392. 
MR 0562769 
[13] V. Pták N. J. Young: 
A generalization of the zero location theorem of Schur and Cohn. IEEE Trans, on Automatic Control AC-25 (1980), 978-980. 
MR 0595237 
[14] V. Pták: 
An equation of Lyapunov type. Lin. Alg. Appl. 39 (1981), 73 - 82. 
MR 0625238 
[15] V. Pták: 
The discrete Lyapunov equation in controllable canonical form. IEEE Trans, on Automatic Control, AC-26 (1981), 580-581. 
MR 0613587 
[16] V. Pták N. J. Young: 
Zero location by Hermitian forms: the singular case. Lin. Alg. Appl. 43(1982), 181-196. 
MR 0656444 
[17] V. Pták: Critical Exponents. Proc. of the Fourth Conference on Operator Theory. Timisoara 1979, 320-329.
[18] V. Pták: 
Biorthogonal systems and the infinite companion matrix. Lin. Alg.  Appl. 49 (1983), 57-78. 
MR 0688376 
[19] V. Pták: 
Lyapunov Equations and Gram Matrices. Lin. Alg. Appl. 49 (1983), 33 - 55. 
MR 0688375 
[20] V. Pták: 
Uniqueness in the first maximum problem. Manuscripts Math., 42(1983), 101-104. 
MR 0693423 
[21] D. Sarason: 
Generalized interpolation in H∞. Trans. Amer. Math. Soc. 127 (1967), 179-203. 
MR 0208383 | 
Zbl 0145.39303 
[22] B. Sz-Nagy: 
Sur la norme des functions de certains operateurs. Acta Math. Acad. Sci. Hungar. 20 (1969), 331-334. 
MR 0256200