1973 · Tryggve Troedsson, W. H. Lyford · Epsilon Open Archive (Sveriges lantbruksuniversitet biblioteket (Swedish University of Agricultural Sciences)) · 25
1969 · Tryggve Troedsson, Carl Olof Tamm · Epsilon Open Archive (Sveriges lantbruksuniversitet biblioteket (Swedish University of Agricultural Sciences)) · 22
1973 · W. H. Lyford, Tryggve Troedsson · Epsilon Open Archive (Sveriges lantbruksuniversitet biblioteket (Swedish University of Agricultural Sciences)) · 11