1. New species definitions in phages of Gram-positive cocci;Ackermann;Intervirology,1984
2. General properties of bacteriophages;Ackermann,1987
3. Natural groups of bacteriophages;Ackermann,1987
4. The species concept and its application to tailed phages;Ackermann;Arch. Virol.,1992
5. The present state of phage taxonomy;Ackermann;Intervirology,1974