1. Kometenschweife und solare Korpuskularstrahlung;Biermann;Z. Astrophys.,1951
2. Physical processes in comet tails and their relation to solar activity;Bierman,1953
3. Solar System Astrophysics;Brandt,1964
4. Comets;Dobrovolsky,1966
5. Wave motion in type-1 comet tails;Dobrovolny,1971