Erlykin A.D. , Ng L.K. , Wolfendale A.W. Interpretation of cosmic ray muon data in the light of results from intersection storage ring experiment. J.Phys. , 7A,N16 , с. P.2059-2073 , 01.1974 Erlykin A.D. , Ng L.K. , Wolfendale A.W. Relationship of the spectrum of sea level muons to that of primary cosmic rays. J.Phys. , 7A,N16 , с. P.2074-2084 , 01.1974 Erlykin A.D. , Ng L.K. , Wolfendale A.W. Response function for near sea level muons. 14-th Intern. Cosmic Ray Conf. Proc. Munich 1975 , Vol.6 , с. P.1999-2002 , 01.1975 Erlykin A.D. , Ng L.K. , Wolfendale A.W. Relationship of the muon charge ratio to the mass composition of primary cosmic rays. 14-th Intern. Cosmic Ray Conf. Proc. Munich 1975 , Vol.6 , с. P.2003-2006 , 01.1975 Erlykin A.D. , Ng L.K. , Wolfendale A.W. Muon charge ratio and the mass composition of primary cosmic rays. J.Phys. , Vol.8 , с. P.L51-L54 , 01.1975