1. Conductometric studies of multiply charged ion track structure in various polymers;Apel;Nucl. Tracks Radiat. Meas.,1991
2. Track regression in polyethylene terephthalate after sensitization;Apel;Pribory i Tekhnika Eksperimenta,1992
3. Degradation of polyethylene terephthalate under irradiation by high energy ions: yield and concentration of carboxyl groups in tracks;Apel;Khimia Vysokikh Energii,1991
4. Registration temperature effect in polypropylene detectors;Apel;Nucl. Tracks Radiat. Meas.,1993
5. Properties of track membranes of different thicknesses;Apel,1993