Benveniste, H., Cofer, G. P., Piantadosi, C. A., Davis, J. N., & Johnson, G. A. (1991). Quantitative proton magnetic resonance imaging in focal cerebral ischemia in rat brain. Stroke, 22(2), 259–268. https://doi.org/10.1161/01.str.22.2.259

Veres, J. S., Johnson, G. A., & Kramer, P. J. (1991). In vivo Magnetic Resonance Imaging of Blechnum Ferns: Changes in T1 and N (H) During Dehydration and Rehydration. American Journal of Botany, 78(1), 80–80. https://doi.org/10.2307/2445231

Maki, J. H., Benveniste, H., MacFall, J. R., & Johnson, G. A. (1991). Maximization of contrast-to-noise ratio to distinguish diffusion and microcirculatory flow. J Magn Reson Imaging, 1(1), 39–46. https://doi.org/10.1002/jmri.1880010105

Maki, J. H., MacFall, J. R., & Johnson, G. A. (1991). The use of gradient flow compensation to separate diffusion and microcirculatory flow in MRI. Magn Reson Med, 17(1), 95–107. https://doi.org/10.1002/mrm.1910170114

Cassel, D. K., Brown, J. M., & Johnson, G. A. (1990). Computer tomographic analysis of water distribution and flow in porous media. Theoretical and Applied Climatology, 42(4), 223–228. https://doi.org/10.1007/BF00865982

Brown, J. M., Kramer, P. J., Cofer, G. P., & Johnson, G. A. (1990). Use of nuclear magnetic resonance microscopy for noninvasive observations of root-soil water relations. Theoretical and Applied Climatology, 42(4), 229–236. https://doi.org/10.1007/BF00865983

MacFall, J. R., Benveniste, H., Maki, J., Johnson, G. A., Hedlund, L., & Copher, G. (1990). MR diffusion measurements in stroke models in rat brains. Proceedings of the Annual Conference on Engineering in Medicine and Biology, (pt 1), 67–68. https://ieeexplore.ieee.org/document/690951

Stern, R. L., Johnson, G. A., & Ravin, C. E. (1990). Magnetic resonance imaging of the thoracic cavity using a paused 3DFT acquisition technique. Magn Reson Imaging, 8(6), 747–753. https://doi.org/10.1016/0730-725x(90)90010-y

Farmer, T. H., Cofer, G. P., & Johnson, G. A. (1990). Maximizing contrast to noise with inductively coupled implanted coils. Invest Radiol, 25(5), 552–558. https://doi.org/10.1097/00004424-199005000-00013

MacFall, J. S., Johnson, G. A., & Kramer, P. J. (1990). Observation of a water-depletion region surrounding loblolly pine roots by magnetic resonance imaging. Proc Natl Acad Sci U S A, 87(3), 1203–1207. https://doi.org/10.1073/pnas.87.3.1203