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57. R. Tanaka and N. Ushida, Nucl. Phys. A585 (1995) 323;
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A. Ariga et al.
18. N.A. Dobrotin, Sov. Phys. Usp. 2 (1960) 974;
M.F. Kaplon and D. M. Ritson, Phys. Rev. 88 (1952) 386.
19. M.F. Kaplon, B. Peters, H.L. Reynolds and D.M. Ritson, Phys. Rev. 88 (1952) 295.
20. J. Nishimura, Soryushiron Kenkyu 12 (1956) 24.
21. K. Niu, Proc. Jpn. Acad., Ser. B 84 (2008) 1;
K. Niu, proc. of the I International Workshop on Nuclear Emulsion Techniques, Nagoya, June
1998.
22. C.M.G. Lattes et al., Prog. Theor. Phys. Suppl. 47 (1971) 1.
23. I. Ohta, K. Kasahara, I. Mito, A. Ohsawa, T. Taira and S. Torii, Proc. of the Int. Cosmic Ray
Conf., Denver, 3 (1973) 2250;
M. Akashi et al., Proc. of the Int. Cosmic Ray Conf., Munich, 7 (1975) 2549.
24. A.V. Apanasenko et al., Astropart. Phys. 16 (2001) 13.
25. T.H. Burnett et al., Nucl. Instrum. Meth. A251 (1986) 583.
26. K. Niu, E. Mikumo, Y. Maeda, Prog. Theor. Phys. 46 (1971) 1644.
27. J.E. Augustin et al., Phys. Rev. Lett. 33 (1974) 1406.
28. J.J. Aubert et al., Phys. Rev. Lett. 33 (1974) 1404.
29. S. Ogawa et.al, Soryushiron Kenkyu 43 (1971) 801;
Z. Maki and T. Maskawa, Prog. Theor. Phys. 46 (1971) 1647;
T. Hayashi et al., Prog. Theor. Phys. 47 (1972) 280.
30. K. Hoshino et al., Proc. Int. Cosmic Ray Symp. on High Energy Phenomena (1974) 161;
H. Sugimoto et al., Prog. Theor. Phys. 53 (1975) 1541.
31. K. Hoshino et al., Proc. of the Int. Cosmic Ray Conf., Munich, 7 (1975) 2442.
32. N. Ushida et al., Nucl. Instrum. Meth. 224 (1984) 50.
33. E.H.S. Burhop et al., Phys. Lett. B65 (1976) 299.
34. D. Allasia et al., Nucl. Phys. B176 (1980) 13.
35. C. Angelini et al., Phys. Lett. B84 (1979) 150.
36. D. Allasia et al., Phys. Lett. B87 (1979) 287.
37. K. Niwa, Physics and Astrophysics of Neutrinos, Springer, Berlin, M. Fukugita and A. Suzuki
(Eds.), (1994) 520.
38. N. Ushida et al., Phys. Lett. B206 (1988) 375.
39. T. Bolton, hep-ex/9708014.
40. G. De Lellis, P. Migliozzi and P. Santorelli, Physics Reports 399 (2004) 227.
41. N. Ushida et al., Phys. Lett. B206 (1988) 380.
42. N. Ushida et al., Phys. Rev. Lett. 45 (1980) 1049;
N. Ushida et al., Phys. Rev. Lett. 45 (1980) 1053;
N. Ushida et al., Phys. Rev. Lett. 48 (1982) 844;
N.Ushida et al., Phys. Rev. Lett. 56 (1986) 1767.
43. N. Ushida et al., Phys. Rev. Lett. 47 (1981) 1694;
N. Ushida et al., Phys. Rev. Lett. 57 (1986) 2897.
44. S.W. Herb et al., Phys. Rev. Lett. 39 (1977) 252.
45. S. Aoki et al., Nucl. Instrum. Meth. A274 (1989) 64.
46. K. Hoshino and G. Rosa, Nucl. Tracks Radiat. Meas. 12 (1986) 477.
47. S. Aoki et al., Nucl. Tracks and Rad. Meas. 12 (1986) 249.
48. J.P. Albanese et al., Phys. Lett. B158 186.
49. S. Aoki et al., Prog. Theor. Phys., 89 (1993) 131.
50. K. Kodama et al., Nucl. Instrum. Meth. A289 (1990) 146.
51. S. Aoki et al., Nucl. Instrum. Meth. B 51 (1990) 466.
52. K. Kodama et al., Nucl. Instrum. Meth. B93 (1994) 340.
53. K. Kodama et al., Prog. Theor. Phys. 89 (1993) 679.
54. A. Shor, Phys. Lett. B215 (1988) 375.
55. S. Aoki et al., Phys. Lett. B224 (1989) 441.
56. N. Armenise et al., Nucl. Instrum. Meth. A361 (1995) 497.
57. R. Tanaka and N. Ushida, Nucl. Phys. A585 (1995) 323;
S. Aoki et al., Phys. Rev. Lett. 65 (1990) 1729.