Tretyakova M.I. , a.o. , Maslennikova N.V. , Chernyavsky M.M. , Antonova M.G. , Boos E.G. , Morozova P.W. , Orlova G.I. General characteristics of proton-nucleon interactions in nuclear emulsion at 67 GeV/c. Phys.Lett.B , Vol.39B,N2 , с. P.282-284 , 01.1972 Tretyakova M.I. , a.o. , Maslennikova N.V. , Chernyavsky M.M. , Antonova M.G. , Boos E.G. , Morozova P.W. , Orlova G.I. Coherent production of particles by 67 GeV/c protons on emulsion nuclei. Phys.Lett.B , Vol.39B,N2 , с. P.285-288 , 01.1972