Collect. Czech. Chem. Commun.
1990, 55, S221-S224
https://doi.org/10.1135/cccc1990s221
Non-radioactive labelling of oligonucleotides with pre-functionalized phosphoramidites or H-phosphonates during automated synthesis
D. Cech, K. Ahlert, U. Möller and F. Schubert