1. Ahtee, L.: Effect of cholinergic drugs on methadone-induced catalepsy and stereotypies in rats treated chronically with methadone. Europ. J. Pharmacol. 39, 203?213 (1976)
2. Ahtee, L., Kaakkola, S.: Effects of drugs acting on cholinergic receptors on the catalepsy and stereotypies induced by morphine and methadone in rats. Satellite Symposium to 6th Internat. Congress of Pharmacology, Abstracts, pp. 20?21, Espoo, July 18?20, 1975
3. Ahtee, L., Kääriäinen, I.: The effect of narcotic analgesics on the homovanillic acid content of rat nucleus caudatus. Europ. J. Pharmacol. 22, 206?208 (1973)
4. Ahtee, L., Kääriäinen, I.: The role of dopamine in pilocarpineinduced catalepsy. Naunyn-Schmiedeberg's Arch. Pharmacol. 284, 25?38 (1974)
5. Ahtee, L., Kääriäinen, I., Paasonen, M. K.: Effect of nalorphine and antiparkinsonian drugs on methadone-induced rigidity; relation to homovanillic acid content of nucleus caudatus. Ann. Med. exp. Fenn. 50, 180?185 (1972)