Application of radioisotope measurements in two-phase flow analysis / Leszek PETRYKA // W: Proceedings of the 12th international conference on Transport & sedimentation of solid particles : 12th international symposium on Freight pipelines : September 20–24, 2004 Prague, Czech Republic, Vol. 1 / eds. P. Vlasák, P. Filip, J. Sobota. — [Wrocław : Wydawnictwa AR], 2004. — (Zeszyty Naukowe Akademii Rolniczej we Wrocławiu ; nr 481. Konferencje ; 37). — S. 59–74. — Bibliogr. s. 73–74

Radioisotope measurements of nodule transport velocities in a vertical pipe / Jerzy Sobota, Stanisław Boczarski, Leszek PETRYKA, Marcin ZYCH // W: Proceedings of the 12th international conference on Transport & sedimentation of solid particles : 12th international symposium on Freight pipelines : September 20–24, 2004 Prague, Czech Republic, Vol. 2 / eds. P. Vlasák, P. Filip, J. Sobota. — [Wrocław : Wydawnictwa AR], 2004. — (Zeszyty Naukowe Akademii Rolniczej we Wrocławiu ; 481. Konferencje ; 37). — S. 611–619. — Bibliogr. s. 619

The non-stationary two-phase flow evaluation by radioisotopes / Leszek PETRYKA, Marcin ZYCH, Radosław Murzyn // W: Tracers and tracing methods TRACER 3 : 22–24 June 2004, Ciechocinek, Poland : proceedings / Warsaw University of Technology. Faculty of Process and Chemical Engineering. Institute of Nuclear Chemistry and Technology ; Laboratoire des Sciences du Génie Chemique ; International Atomic Energy Agency. — Warszawa : INChT, 2004. — ISBN10: 8390969025. — S. 34–39. — Bibliogr. s. 39, Abstr.