Alheid G F, Carlsen J
Brain Res. 1982 Mar 4;235(1):174-8. doi: 10.1016/0006-8993(82)90209-8.
Iontophoresis and chronic micropipette implants were compared for delivery of retrograde fluorescent tracers. Injection sizes and retrograde transport were similar, but implants were more frequently successful than iontophoresis.