Takalo, L.O., et al. 1994, Simultaneous UBVRI photopolarimetry of three blazars: 3C66A, S5 0716+714 and OJ 287, A&AS, 107, 497

Kidger, M., et al. 1996, A large optical and infrared outburst in OJ 287, A&A, 303, 973

Sillanpää, A., et al. 1996, Confirmation of the 12 year optical outburst cycle in blazar OJ 287, A&A, 305, L17

Gonzales-Perez, N., et al. 1996, The microvariability characteristics of OJ287, A&A, 311, 57

Nilsson, K., et al. 1996, The complex environment of AO 0235+164, A&A, 314, 754

Sillanpää, A., et al. 1996, Double-peak structure in the cyclic optical outburst of blazar OJ287, 1996, A&A, 315, L13

Takalo, L.O., et al. 1996, Monitoring of 3C 66A during an extended outburst, A&AS, 120, 313

Lehto, H., Valtonen, M., 1996 OJ 287 outburst structure in the binary black hole model, ApJ, 460, 207

Benitez, E., et al. 1996, The Close Environment of OJ 287: Underlying nebulosity and a possible optical jet, ApJ, 464, L47

Dultzin-Hacyan, D., et al. 1997, Microvariability in OJ 287 during a flare, Rev.Mex.A&A, 33, 17

De Diego, J.A., et al. 1997, Rapid infrared spectral variability of 3C66A in outburst, A&A, 318, 331

Stothers, R.B., Sillanpää, A., 1997, Test for periodicity in the quasar OJ 287, ApJ, 475, L13

Valtonen, M., Lehto, H., 1997, Outburst in OJ 287: A new test for general theory of relativity, ApJ, 481, L5

Villata, M., Raiteri, C., Sillanpää, A., Takalo, L.O., 1998 A beaming model for the OJ 287 periodic optical outbursts, MNRAS, 293, L13

Takalo, L.O., Sillanpää, A., Valtaoja, E., Katajainen, S., Nilsson, K., Pursimo, T., Heinämäki, P., Villata, M., Raiteri, C. M., Ghisellini, G., de Francesco, G., Lanteri, L., Chiaberge, M., Peila, A., Boltwood, P., Tosti, G., Fiorucci, M., Teräsranta, H., Tornikoski, M.: 1998, Monitoring of AO 0235+164 during a faint state, A & AS, 129, 577

Hagen-Thorn, V.A., Marschenko, S.G., Takalo, L.O., Sillanpää, A., Pursimo, T., Boltwood, P., Kidger, M., Gonzales-Perez, J.N., 1998, The variable sources responcible for the photometric behaviour of OJ 287 in the IR-optical-UV region during 1993-1996, A&AS, 133, 353

Pietilä, H., Takalo, L.O., Tosti, G., E. Benitez, B. Chiatteli, R.L.M. Corradi, G. Cox, J.A. de Diego, G. De Francesco, D. Dultzin-Hacyan, P. Heinämäki, S. Katajainen, P. Keinänen, H. Korhonen, J. Kotilainen, M. Lainela, J. Licardo, M. Luciani, A. Sillanpää, K. Nilsson, T. Pursimo, C. Raiteri, R. Rekola, H. Teräsranta, M. Villata, A. Zurita, 1999, OJ 287 and the predicted fade of 1998, A&A, 345, 760

Lainela, M., Takalo, L.O., Sillanpää, A., Pursimo, T., Nilsson, K., Massaro, E., Maesano, M., Montagni, F., Nesci, R., Tosti, G., Fiorucci, M., Luciani, M., Villata, M., Raiteri, C.M., De Francesco, G., Lanteri, L., Chiaberge, M., Sobrito, G., Dultzin-Hacyan D., Benitez, E., de Diego, J.A., 1999, The 65 day period in 3C66A during outburts, ApJ, 521, 561

Takalo, L.O., Sillanpää, A., T. Pursimo, Hanski, M., Heinämäki, P., Katajainen, S., Lainela, M., K. Nilsson, Nurmi, P., Pietilä H., Rekola, R., Riehokainen, A., Valtaoja, E., de Diego, J.A., Boltwood, P., Dultzin-Hacyan, D., Benitez, E., Turner, G., Honeycutt, K., Efimov, Yu., Shakhovskoy, N., Maesano, M., Massaro, E., Nesci, R., Honeycut, R.K., Robertson, J.W., Turner, G.W., Teräsranta, H., Tornikoski, M., Tosti, G., Fiorucci, M., Villata, M., Raiteri, C., De Francesco, G., G. Poyner 1999, Monitoring of 3C 66A during an extended outburst II. 1995-1998, Blazar Data, Vol 1, p6

Pursimo, T., Takalo, L.O., Sillanpää, A., Kidger, M., Lehto, H.J., Heidt, J., Charles, P.A., Aller, H., Aller, M., Beckman, V., Benitez, E., Bock, H., Boltwood, P., Borgeest, U., de Diego, J.A., De Francesco, G., Dietrich, M., Dultzin-Hacyan, D., Efimov, Yu., Fiorucci, M., Chisellini, G., Gonzales-Perez, N., Hanski, M., Heinämäki, P., Honeycutt, K., Hughes, P., Karlamaa, K., Katajainen, S., Knee, L.B.G., Kurtanidze, O., Kümmel, M., KÜhl, D., Lainela, M., Lanteri, L., Linde, J.V., Lähteenmäki, A., Maesano, M., Mahoney, T., Marchenko, S., Marscher, A.P., Massaro, E., Montagni, F., Nesci, R., Nikolashvili, M., K. Nilsson, Nurmi, P., Pietilä, H., Poyner, G., Raiteri, C.M., Rekola, R., Richter, G.M., Riehokainen, A., Robertson, J.W., Rodriques-Espinoza, J.-M., Sadun, A., Shakhovskoy, N., Schramm, K.J., Schramm, T., Sobrito, G., Teerikorpi, P., Teräsranta, H., Tornikoski, M., Tosti, G., Turner, G.W., Valtaoja, E., Valtonen, M., Villata, M., Wagner, S.J., Webb, J., Weneit, W., Wiren, S., 2000, Intensive monitoring of OJ 287, A&AS, 146, 141

Efimov, Y., Shakhovskoy, N., Takalo, L.O., Sillanpää, A., 2002, Photopolarimetric monitoring of OJ 287 in 1994-1997, A&A, 381, 408