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On the structure of sunspot penumbraMULLER, R.Solar physics. 1985, Vol 98, Num 1, pp 51-52, issn 0038-0938Article

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LA REGION DE NOIRCISSEMENT AUTOUR D'UNE FACULE SOLAIRE1972; ASTR. CIRK., IZDAV. BJURO ASTR. SOOBSHCH. AKAD. NAUK S.S.S.R.; S.S.S.R.; DA. 1972; NO 670; PP. 3-5; BIBL. 3REF.Serial Issue

A detailed analysis about penumbra causticsMARCHIANO, Régis.The Journal of the Acoustical Society of America. 2010, Vol 127, Num 4, pp 2129-2140, issn 0001-4966, 12 p.Article

Fortes fluctuations des espaces totaux d'ombres et de pénombres de taches solaires entre 1879 et 1976VITINSKIJ, YU. I.Solnečnye dannye. 1984, Num 8, pp 79-84, issn 0552-5829Article

A model of a penumbral chromosphereYUN, H. S; BEEBE, H. A; BAGGETT, W. E et al.Solar physics. 1984, Vol 92, Num 1-2, pp 145-151, issn 0038-0938Article

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MODE OF PROPAGATION OF PENUMBRAL WAVES.MALTBY P.1975; NATURE; G.B.; DA. 1975; VOL. 257; NO 5526; PP. 468-469; BIBL. 8 REF.Article

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FINE STRUCTURE AND EVERSHED MOTIONS IN THE SUNSPOT PENUMBRA.GALLOWAY DJ.1975; SOLAR PHYS.; NETHERL.; DA. 1975; VOL. 44; NO 2; PP. 409-415; BIBL. 13 REF.Article

THE CROSSOVER EFFECT IN SUNSPOTS AND THE FINE STRUCTURE OF PENUMBRA.GOLOVKO AA.1974; SOLAR PHYS.; NETHERL.; DA. 1974; VOL. 37; NO 1; PP. 113-125; BIBL. 10 REF.Article

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CORRECTION OF SOLAR OBSERVATIONS FOR STRAY LIGHT BY NUMERICAL INTEGRATION, WITH APPLICATION TO MERCURY'S DROPBRAHDE R.1972; SOLAR PHYS.; NETHERL.; DA. 1972; VOL. 26; NO 2; PP. 318-334; BIBL. 11REF.Serial Issue

Proton beam penumbra: effects of separation between patient and beam modifying deviceURIE, M. M; SISTERSON, J. M; KOEHLER, A. M et al.Medical physics (Lancaster). 1986, Vol 13, Num 5, pp 734-741, issn 0094-2405Article

On the spatial structure of a penumbraTEPLITSKAYA, R. B.Solar physics. 1985, Vol 95, Num 1, pp 45-49, issn 0038-0938Article

CONVECTION AND THE ORIGIN OF EVERSHED FLOWS IN SUNSPOT PENUMBRAESCHARMER, G. B; NORDLUND, A; HEINEMANN, T et al.The Astrophysical journal. 2008, Vol 677, Num 2, issn 0004-637X, L149-L152, 2Article

Etude de Michel PrunerTARDIEU, J.Quaderni del Novecento Francese. 1990, Num 11, pp 129-133Article

The influences of penumbral fine structures on line profilesWIEHR, E; KOCH, A; KNÖLKER, M et al.Astronomy and astrophysics (Berlin. Print). 1984, Vol 140, Num 2, pp 352-356, issn 0004-6361Article