Nickell, Louis G. (February 1993). "A tribute to Hugo P. Kortschak: The man, the scientist and the discoverer of C4 photosynthesis". Photosynthesis Research. 35 (2): 201–204. doi:10.1007/BF00014751. ISSN0166-8595. PMID24318687. S2CID40107210.
Nickell, Louis G. (February 1993). "A tribute to Hugo P. Kortschak: The man, the scientist and the discoverer of C4 photosynthesis". Photosynthesis Research. 35 (2): 201–204. doi:10.1007/BF00014751. ISSN0166-8595. PMID24318687. S2CID40107210.
Nickell, Louis G. (February 1993). "A tribute to Hugo P. Kortschak: The man, the scientist and the discoverer of C4 photosynthesis". Photosynthesis Research. 35 (2): 201–204. doi:10.1007/BF00014751. ISSN0166-8595. PMID24318687. S2CID40107210.
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Nickell, Louis G. (February 1993). "A tribute to Hugo P. Kortschak: The man, the scientist and the discoverer of C4 photosynthesis". Photosynthesis Research. 35 (2): 201–204. doi:10.1007/BF00014751. ISSN0166-8595. PMID24318687. S2CID40107210.