SULFIANTI, A. et al. 2015. Cloning and Expression of HA1 Gene of H1N1 Influenza Virus 2009 Pandemic (H1n1pdm09) Indonesia Strain in the Pichia Pastoris Expression System for the Development of Influenza Vaccine. Microbiology Indonesia. 9, 2 (Dec. 2015), 7. DOI:https://doi.org/10.5454/mi.9.2.7.