Olszak W., P. P. (1961). Extremum Theorems in General Viscoelasticity. Académie polonaise des sciences.
Чикаго маягийн жагсаалтOlszak W., Perzyna P. Extremum Theorems in General Viscoelasticity. Warszawa: Académie polonaise des sciences, 1961.
MLA ишлэлOlszak W., Perzyna P. Extremum Theorems in General Viscoelasticity. Académie polonaise des sciences, 1961.
Warning: These citations may not always be 100% accurate.