Hamad M . S ., Hamza IA, Al-Muktar S . A . Influence of sucrose and tyrosine on callus induction and morphine and codeine production on Papaver somniferum In vitro. JOBRC [Internet]. 2010 Jun. 1 [cited 2025 May 21];4(2):45-53. Available from: https://www.jobrc.org/index.php/jobrc/article/view/120