Scanning electron microphotograph of floating microballoons.
Prashant Malik, Upendra Nagaich, Raj Kaur Malik, Neha Gulati
CC BY 4.0
Prashant Malik et. al. "Pentoxifylline Loaded Floating Microballoons: Design, Development and Characterization", Journal of Pharmaceutics <a rel="nofollow" class="external text" href="https://doi.org/10.1155/2013/107291">doi:10.1155/2013/107291</a>