On the mutual changes of the modulus of a regular function with positive real part and the modulus of its derivative
English version (Springer): Ukrainian Mathematical Journal 22 (1970), no. 5, pp 585-590.
Citation Example: Gutlyanskii V. Ya. On the mutual changes of the modulus of a regular function with positive real part and the modulus of its derivative // Ukr. Mat. Zh. - 1970. - 22, № 5. - pp. 680—685.
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