1. Investigation of abdominal masses by pulsed ultrasound;Donald;Lancet,1958
2. Development, via compression, of electric polarization in hemihedral crystals with inclined faces;Curie;Bull. Soc. Miner. Fr.,1880
3. Contractions and expansions produced by voltages in hemihedral crystals with inclined faces;Curie;Comptes Rendus,1881
4. Echo sounding;Langevin;Hydro Rev.,1924
5. Paul Langevin and the discovery of active sonar;Zimmerman;North. Mar.,2002