Available at: http://www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl. Ziegler G, Ploch M, Miettinen-Baumann A, Collet W. Efficacy and tolerability of valerian extract LI 156 compared with oxazepam in the treatment of non-organic insomnia--a randomized, double-blind, comparative clinical study.
Disponible en ligne à : http://www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl. Ziegler G, Ploch M, Miettinen-Baumann A, Collet W. Efficacy and tolerability of valerian extract LI 156 compared with oxazepam in the treatment of non-organic insomnia − a randomized, double-blind, comparative clinical study.