Heine H, Schaeg G, Nasemann T
Arch Dermatol Res (1975). 1977 Dec 27;260(3):241-6. doi: 10.1007/BF00561419.
Dependent on the direction in which the specimens are sectioned annular shaped nexus of neighbouring cell membranes may be misinterpreted as "virus like particles". It is suggested that many of the "virus like particles" described in tumor research may be annulate nexus.
